Indeed. Nationalism, playing the man instead of the ball, blindness to hypocrisy because "the other side does it", whataboutery, and all round aversion to principles and reasoning. It long predates social media, but social media makes it worse, and the dilution of a basic consensus source of truth into fragmented tribe-truths - I don't know where it leads but it's not a good place. Soon, whatever deluded tribe gets their hands on the rudder will drive the ship of state until it hits the rocks of reality.