Well I think it's why they persistently won't "wake up" no matter what happens. Sort of like the Scott Adams angle on persuasion, that human beings usually employ logic to back up the emotional decision they already made. In this case it's not really about Trump and it's not really about "what he did wrong". Aside from general ridiculous statements ("that tweet was treason" type stuff) they cant even verbalize what they hate so much about him. "Mad at their dad" is my own armchair diagnosis