This problem is common to nearly every subreddit, on every side of the political spectrum. Unaccountable moderators will ban you in a heartbeat for arbitrary reasons, such as disagreeing with the sub's majority opinion.

I was banned from my (very liberal) U.S. state's subreddit for quoting Martin Luther King. I quoted a passage from one his speeches that denounced political violence, such as the arson and vandalism we've seen in Kenosha recently. The subreddit moderator banned me within minutes, called me a Nazi, and immediately denied the appeal.