This is true on so many levels, and I have a THEORY why:
Most public schools are afraid that if they say no to making a gay club for school, they might get sued by their woke parents for being homophobic when in reality there's just no point in it being held on school grounds while the park is wide open for the taking.
Now that my THEORY is out of the way, lemme give some of my input on the topic at hand.
Clubs should be used for activities, not activists. Art club, D&D club, drama club, music club, chess club... the list goes on and all of these have actual activities. What the hell is an LGBT club gonna do after school, make them stand out more because they have a single rainbow flag while they talk about how woke they are? Face it, there is no point for schools of any kind to have a gay club if it doesn't serve a specified activity of some sort. Protesting for attention and rights is not an activity, it's a distraction to everyone else at the school and could potentially bother people to the point where they can barely focus in class. The same goes for the satanic one, however it would go against the free exercise clause to say they aren't allowed to worship the devil, period. I'm sure they would have their reasons for not allowing it on school grounds, but nothing is really stopping them from doing this kind of thing outside of school. The pro-communist one, I don't know what to say to that one since I don't understand nor know enough about communism or how it works.
Anyway, that's my input.