MSMG is so incredibly lenient with what they allow that site mods have to intervene. Not exactly the pinnacle of moderation.
Additionally, they have very different purposes. People in the LGBTQ community have to deal with harassment and insults all the time. The LGBTQ stream is a break from that. The mood is supposed to be supportive and safe, rather than the anything goes mood MSMG has.
It isn’t that any form of insult criticizes LGBTQ, but rather that insulting people isn’t allowed in the first place. It’s not the place for attacking others.
So yes, posts that aren’t supportive of LGBTQ are not allowed on the LGBTQ stream. Just like a cats suck image is not allowed in the cats stream.
Also it’s not to hard to get unbanned if a mod messes up, people make mistakes.