Sectarianism in the context of "Criticism of Christianity"

The schools of Buddhism are the various institutional and doctrinal divisions of Buddhism, which have often been based on historical sectarianism and the differing teachings and interpretations of specific Buddhist texts. The branching of Buddhism into separate schools has been occurring from ancient times up to the present. The classification and nature of the various doctrinal, philosophical or cultural facets of the schools of Buddhism is vague and has been interpreted in many different ways, often due to the sheer number (perhaps thousands) of different sects, sub-sects, movements, etc. that have made up or currently make up the whole of the Buddhist tradition. The sectarian and conceptual divisions of Buddhist thought are part of the modern framework of Buddhist studies, as well as comparative religion in Asia. Some factors in Buddhist doctrine appear to be consistent across different schools, such as the afterlife and the Buddha, while others vary considerably.

From a largely English-language standpoint, and to some extent in most of Western academia, Buddhism is separated into two groups: Theravāda (lit. 'the Teaching of the Elders' or 'the Ancient Teaching'), and Mahāyāna (lit. 'the Great Vehicle'). The most common classification among scholars is threefold: Theravāda, Mahāyāna and Vajrayāna.

The Society of United Irishmen was a sworn association, formed in the wake of the French Revolution, to secure representative government in Ireland. Despairing of constitutional reform, and in defiance both of British Crown forces and of Irish sectarian division, in 1798 the United Irishmen instigated a republican rebellion. Their suppression was a prelude to the abolition of the Irish Parliament in Dublin and to Ireland's incorporation in a United Kingdom with Great Britain.

Espousing principles they believed had been vindicated by American independence and by the French Declaration of the Rights of Man, the Presbyterian merchants who formed the first United society in Belfast in 1791 vowed to make common cause with their Catholic-majority fellow countrymen. Their "cordial union" would upend the landed Anglican Ascendancy and hold government accountable to a reformed Parliament.

Sectarian violence or sectarian strife is a form of religious violence which is inspired by sectarianism, that is, discrimination, hatred or prejudice between different sects of a particular mode of an ideology or different sects of a religion within a nation or community. Religious segregation often plays a role in sectarian violence. The concept can be applied to both inter- as well as intra-group violence and is context dependent for instance considering political, social, and cultural factors. Strategies for ending violence include the inter-group contact theory and the democratic peace theory.

Sectarian violence among Christians is a recurring phenomenon, in which Christians engage in a form of communal violence known as sectarian violence. This form of violence can frequently be attributed to differences of religious beliefs between sects of Christianity (sectarianism). Sectarian violence among Christians was common, especially during late antiquity, and the years surrounding the Protestant Reformation, in which the German monk Martin Luther disputed some of the Catholic Church's practices; particularly the doctrine of Indulgences, and it was crucial in the formation of a new sect of Christianity known as Protestantism. During the latter half of the Renaissance was when sectarianism related violence was most common among Christians. Conflicts like the European wars of religion or Dutch Revolt ravaged Western Europe. In France there were the French Wars of Religion and in the United Kingdom anti-Catholic hate was heightened by the Gunpowder Plot of 1605. And while sectarian violence may seem like an archaic footnote today, sectarian violence among Christians still persists in the modern world with groups such as the Ku Klux Klan (which prominently uses the Bible along with the official KKK handbook, the Kloran, to espouse its teachings) perpetuating violence among Catholics.

The earliest period when widespread sectarian violence occurred among Christians was the period of late antiquity (3rd century CE to 8th century CE). Events like the wars which followed the Council of Chalcedon and Constantine's persecution of the Arians caused late antiquity to be considered one of the worst periods of time for a person to be a Christian in. Other conflicts such as the Albigensian Crusade, led to wars with over 1,000,000 casualties.

Serbian nationalism asserts that Serbs are a nation and promotes the cultural and political unity of Serbs. It is an ethnic nationalism, originally arising in the context of the general rise of nationalism in the Balkans under Ottoman rule, under the influence of Serbian linguist Vuk Stefanović Karadžić and Serbian statesman Ilija Garašanin.Serbian nationalism was an important factor during the Balkan Wars which contributed to the decline of the Ottoman Empire, during and after World War I when it contributed to the dissolution of the Austro-Hungarian Empire, and again during the breakup of Yugoslavia and the Yugoslav Wars of the 1990s.

After 1878, Serbian nationalists merged their goals with those of Yugoslavists, and emulated the Piedmont's leading role in the Risorgimento of Italy, by claiming that Serbia sought not only to unite all Serbs in one state, but that Serbia intended to be a South Slavic Piedmont that would unite all South Slavs in one state known as Yugoslavia. Serbian nationalists supported a centralized Yugoslav state that guaranteed the unity of the Serbs while resisting efforts to decentralize the state. The Vidovdan Constitution adopted by Yugoslavia in 1921 consolidated the country as a centralized state under the Serbian Karađorđević monarchy. Croatian nationalists opposed the centralized state and demanded decentralization and an autonomous Croatia within Yugoslavia, which was accepted by the Yugoslav government in the Cvetković–Maček Agreement of 1939. Serbian nationalists opposed the agreement on the grounds that it weakened the unity of Serbdom, asserting its importance to Yugoslavia with the slogan "Strong Serbdom, Strong Yugoslavia". The invasion and partition of Yugoslavia in World War II resulted in violent ethnic conflict between nationalist Serbs, Croats, Bosniaks, and others, resulting in a highly violent sectarian variant of Serbian nationalism rising in the Chetnik movement.

During 12–16 August 1969, there was an outbreak of political and sectarian violence throughout Northern Ireland, which is often seen as the beginning of the thirty-year conflict known as the Troubles. There had been sporadic violence throughout the year arising out of the Northern Ireland civil rights campaign, which demanded an end to discrimination against Catholics and Irish nationalists. Civil rights marches had been attacked by Protestant loyalists, and protesters often clashed with the Royal Ulster Constabulary (RUC), the overwhelmingly Protestant police force.

On 12 August, the Battle of the Bogside erupted in Derry: three days of fierce clashes between the RUC and thousands of Catholic/nationalist residents of Derry's Bogside district. The besieged residents built barricades and set up first aid posts and workshops for making petrol bombs. Police fired CS gas at rioters for the first time in the history of the UK. In support of the Bogsiders, on 13 August Catholics/nationalists held protests elsewhere in Northern Ireland, some of which led to violence. The bloodiest clashes were in Belfast, where seven people were killed and hundreds wounded, five of them Catholic civilians shot by police. Protesters clashed with both the police and with loyalists, who attacked Catholic districts. Scores of homes and businesses were burnt out, most of them owned by Catholics, and thousands of mostly Catholic families were driven from their homes. In some cases, police helped the loyalists and failed to protect Catholic areas. Both republican and loyalist paramilitaries were involved in the clashes. There were also clashes between protesters and police in Armagh, where a protester was killed by police, as well as in Dungannon and Newry.

The Iraqi civil war was a short armed conflict from 2006 to 2008 between various sectarian Shia and Sunni armed groups, such as the Islamic State of Iraq and the Mahdi Army, in addition to the Iraqi government alongside American-led coalition forces. In February 2006, the insurgency against the coalition and government escalated into a sectarian civil war after the bombing of Al-Askari Shrine, considered a holy site in Twelver Shi'ism. US President George W. Bush and Iraqi officials accused Al-Qaeda in Iraq (AQI) of orchestrating the bombing. AQI publicly denied any links. The incident set off a wave of attacks on Sunni civilians by Shia militants, followed by attacks on Shia civilians by Sunni militants.

The UN Secretary General stated in September 2006 that if patterns of discord and violence continued, the Iraqi state was in danger of breaking up. On 10 January 2007, Bush said that "80% of Iraq's sectarian violence occurs within 30 miles (48 km) of the capital. This violence is splitting Baghdad into sectarian enclaves, and shakes the confidence of all Iraqis." By late 2007, the National Intelligence Estimate described the conflict as having elements of a civil war. In 2008, during the Sunni Awakening and the U.S. troop surge, violence declined dramatically. However, an insurgency by ISI continued to plague Iraq following the U.S. withdrawal in late 2011. In June 2014, the Islamic State of Iraq and the Levant, the successor to Islamic State of Iraq, launched a major military offensive against the Iraq government and declared a self-proclaimed worldwide Islamic caliphate. This led to another full-scale war from 2013 to 2017, in which the government declared victory.

The 2012–2013 Iraqi protests started on 21 December 2012 following a raid on the home of Sunni Finance Minister Rafi al-Issawi and the arrest of 10 of his bodyguards. Beginning in Fallujah, the protests afterwards spread throughout Sunni Arab parts of Iraq. The protests centered on the issue of the alleged sectarianism of Prime Minister Nouri al-Maliki. Pro-Maliki protests also took place throughout central and southern Iraq, where there is a Shia Arab majority. In April 2013, sectarian violence escalated after the 2013 Hawija clashes. The protests continued throughout 2013, and in December Maliki used security forces to forcefully close down the main protest camp in Ramadi, leaving at least ten gunmen and three policemen dead in the process.