Irrational? I hated him long before he had any indictments, purely on his speech and actions. The indictments and his followers, obviously enraptured by his overt racism, only cemented that hatred. For many, Trump is in the same class as Hitler and Putin. Sucking up to Putin and blackmailing Ukraine absolutely blew it for me. Praising the NK dictator and that fascist in charge of Hungary didn't help either. Plus he was mates of the scumbag lying happy clapper we had as the last prime minister in Australia. There's nothing to like about him.
You accuse lefties of being uninformed without basis but statistics tells you that librels are better educated than "patriots".
edit: I forgot to mention the white supremacist militias who worship him.