If we’re just talking about forums on Reddit, /r/the_donald was infamous for frequently banning people (myself included), and /r/libertarian and /r/conservative been known to ban people for wrongthink. Such is the nature of partisan moderation - basically amounts to “there are no good or bad actions, only good or bad people/ideologies”. You are right, though, that people will also start attacking when you commit wrongthink on a conservative subreddit.