Scientology. Actual quote by L Ron Hubbard - "You don't get rich writing science fiction. If you want to get rich, you start a religion." Also Xenu, Thetans, billion year contracts, child abuse and slave labor, the Sea Org, what happened to Shelly Miscavige, etc.

Islam culturally for having honor killings and people getting assassinated for cartoons of Muhammad and Quran burning. But hopefully people realize that's not universal to all Muslims. I know a few really cool people who are Muslim.

Shout out to Mormonism too. That religion is such a cult. I know a couple ex-mormons. Their stories are beyond fucked and they can't talk to any of their family who are still in the cult.