It's easy to understand when you realize that everything is team sports with Republicans. as pathetic as trump is and has become, a ton of them still support him.
Imagine if any Democrat gassed protesters in the street so they could take a weird picture with an upside down bible in front of a church they'd not step a toe into if their life depended on it. Republicans would talk about how fucked it was for decades. Trump does it, it's worth defending to the death
People falsely claim Biden is incoherent in order to deflect from this sort of shit with Trump. If you go around assuming the fascists actually believe the nonsense they're saying, you're gonna have a bad time.