I think what you're describing is not just political opinions, but shared values. Especially when it comes to upholding human rights, and dismantling systems of oppression that threaten human rights.

Right wingers don't really have any shared values, except obtain and hold power by any means necessary, so right wing forums are outrageously toxic to each other even when they technically hold the same political position.

That's why we have a "loneliness epidemic", as it turns out, being a genocide-supporting chud who doesn't know empathy also robs you of genuine human intimacy.