Don't be oppressive. No racist, misogynist, antisemitic, Islamophobic crap, please. I am pretty good at telling the difference between disagreement in opinion and the denial of people to exist, and the latter won't be tolerated.
Don't tell anybody who's Jewish, that they're not Jewish. If they say they're Jewish and don't believe in Jesus, they're Jewish. You'll be banned without discussion if you cross this line.
Don't talk like a muzhik. Muzhik in Russian, in this context, roughly means "toxic man." In other words, if the best you can do to advocate for your position is that your opponent sucks dicks, just... Just shut up and go away. In fact, you won't have another choice because we will ban you. Swearing and some hyperbole is ok, though, if it's used as an intensity modifier for actual ideas.
Don't be a troll. Don't come here if your goal is get a rise out of people, gaslight them, sealion, and so forth, rather than to have a conversation.