It's not sociopathy. It's in/out group thinking with a dehumanization effort put into the outgroup. That, coupled with cult-like social programming ("I've burnt bridges with all of the people who think that this is wrong, if I tell the others in the group I think this is wrong, I'll have no one left") and you've got the mixture. People who belong to MAGA will align their thinking with what the party says because they don't want to be kicked out and become one of "them".