Oh my, if they were really brave they would un-ban all the supposed liberals that ever slightly ruffled their feathers.
Its not like leftist subreddits never banned Slight opposed viewpoints from conservatives. Both sides are bad when it comes to censorship
That sub in particular is just notable for banning people for even mild "offenses". I found a post from it on r/all and asked a comment for a source on a claim they made and got permabanned for it calling me a troll.
I worded it as "Damn, haven't heard that. Where can I learn more? " and got banned for "concern trolling"
Sounds like you got banned because your perfect grammar gave away your political leanings.