From Wikipedia:

The Nation of Islam (NOI) is a religious and political organization founded in the United States by Wallace Fard Muhammad in 1930. A black nationalist organization, the NOI focuses its attention on the African diaspora, especially on African Americans. While it identifies itself as promoting a form of Islam, its beliefs differ considerably from mainstream Islamic traditions. Scholars of religion characterise it as a new religious movement. It operates as a centralized and hierarchical organization. Its critics, including the Southern Poverty Law Center and the Anti-Defamation League, have accused it of being a black supremacist hate group that promotes racial prejudice towards white people, anti-semitism, and anti-LGBT rhetoric. Muslim critics accuse it of promoting teachings that are not authentically Islamic.