"Synagogue of Satan" is a derogatory term used by various antisemites — such as the Nation of Islam, extremist sects of the Black Hebrew Israelite movement and many extremists who identify as Christians — to refer to... Read more

Abdul Alim Musa, born Clarence Reams, is an American Islamist extremist who founded the radical group As-Sabiqun as well as the Islamic Institute of Counter-Zionist Psychological Warfare. Musa has claimed that the Jews ran the Trans-Atlantic slave... Read more

The tawhid emoji or hand gesture is frequently used by Islamists, and ISIS members in particular, to signify their membership. The single finger is meant to reference "tawheed," a religious term for the belief that there is... Read more

The tax protest movement is the oldest wing of the anti-government extremist "Patriot" movement, dating back to the mid-1960s. In contrast to people who merely dislike taxes, adherents of the tax protest movement use pseudo-legal arguments to... Read more

Telegram is an encrypted social networking app that has become popular among white supremacists and other extremists who have been banned from more popular sites or seek out less content moderation.

"Ten Days of Darkness" refers to QAnon's prophesized period of unrest that will correspond with The Storm, which has led to vivid speculation about any news story or event referencing 10 days. When former President Donald Trump... Read more

Mohammed Emwazi, Aine Davis, Alexanda Kotey, and El Shafee Elsheikh were four London-raised men who traveled to join the ISIS. They became infamous for their presence in ISIS beheading videos, during which they killed at least 27... Read more

"The Clashing of Swords" is a pair of propaganda films released by ISIS in 2014. These two videos featured graphic violence and scenes of life under ISIS. They became some of the group's most popular releases, and... Read more