I got a similar (temporary) ban on Facebook for "hate speech". My crime? Someone had mentioned the motto above the gates of Auschwitz, so I simply - for information - gave the original German "arbeit macht frei". In no way was I condoning this in any way whatever.
What makes the FB bans so especially annoying is that there is no way to get in touch with those wonks to explain the supposed offending post.
However, and here's a tip for anyone who thinks they MIGHT fall foul of the "rules", FB can't read what's on an image so type out your post in a text app then take a screenshot of it and post the screenshot instead.