A few years ago, the Lemmy Developers decided to keep their political views on lemmygrad while keeping lemmy.ml more neutral. Now they are banning users who are critical of their actions and bigotry.
Anti-Tankie posts may put you at risk of being banned from commenting and posting on the lemmy.ml instance.
Arguments range from “tank man was peacefully moved after the photo” to “the photo was staged by the CIA.” It really is as dumb as it sounds, but insular communities have a way of amplifying and reinforcing crazy.