“the Rambam paskens that it is a mitzvah deoraysa for us to have a king”
And as you certainly know, other rishonim argued strongly against that Rambam, in particular Abarbanel who had horrible things to say about monarchies.
“some of the other gedolim may have not agreed with the Satmar Rebbe was how to treat the zionist state ex post facto once it existed”
And some of the other gedolim were actually religious Zionists themselves! Read for example Rov Soloveitchik’s Kol Dodi Dofeik.
“I can’t imagine there are any legal issues in censoring comments”
Correct! If I don’t like the site’s policies I am perfectly free to start a competing site.