I'm noticing that the more extreme members of both major political parties insist on exhibiting their hatred of the other group. It appears they actively enjoy the hating.
As we watch them we should remember the emotional orgies indulged in by Mao's Red Guards, Hitler's Storm Troopers, the Klu Klux Klan, the jihadis, both sides in Northern Ireland, and urban rioters everywhere. In short, what we're seeing is no new phenomenon, but a very old and unattractive human trait - the mindless high of the mob.
Cooler heads in both parties should discourage orgies of hate among their supporters.