I always hear the the Falun Gong are a cult, but I never really hear what makes it a cult. I skimmed the Wikipedia page and it only really said that Falun Gong is a spiritual movement. The oppression of them seems kinda bad in my opinion, but I am very uninformed.
Edit: thanks very much to everyone who replied
Along with everything else in this thread, they also believe that their followers have pure spiritual energy that possesses them to have "perfect" organs and that the reason Chinese communists persecute them is so that they can harvest these organs. So if you've ever heard that China harvests people's organs online or on the news it comes from rumors spread by this cult.
Plus they have a spooky compound in the mountains of upstate New York where members live and receive "religious education"