Islamophobia is the irrational fear of, hostility towards, or hatred of the religion of Islam or Muslims in general. Islamophobia is characterised as a form of religious or cultural bigotry in which Muslims are stereotyped as a geopolitical threat or a source of terrorism. Muslims, with diverse ethnic and cultural backgrounds on a worldwide scale, are often inaccurately portrayed by Islamophobes as a single homogeneous racial group.
The causes of increased Islamophobia across the world since the end of the Cold War are many. These include the quasi-racialist stereotypes against Muslims that proliferated through the Western media since the 1990s, the "war on terror" campaign launched by the United States after the September 11 attacks, the rise of the Islamic State in the aftermath of the Iraq War, terrorist attacks carried out by Islamist militants in the United States and Europe, anti-Muslim rhetoric disseminated by white nationalist organizations through the internet, and the radicalisation of Christian nationalist and far-right groups with growing hostility towards Muslims in the United States and the European Union.