How much stuff have the republicans already blamed democrats for?
A lot. But they can literally never back up any of their claims.
Do you think that the MAGA base wouldn’t execute Biden for his ‘crimes’ in Ukraine?
Desire to? Yeah, I'd assume so. They tried to overthrow the government and murder Democratic leadership once already. Be capable of? No.
My prediction is that in much the same way Italy and Germany unified after the deaths of their respective far right leaders, America would eventually move on and become more unified as well. Maga is a cult of personality with Trump as the sole proprietor. When he goes, there'd likely be a power vacuum too big to fill and the cult fractures into multiple small factions that eventually lose popularity. Mayyybe one or two starts to gain traction, but they're much easier to deal with than the inertia Maga has right now.
You're not wrong, but we don't have the luxury of only making decisions based on rationality. Sometimes you need to trust your intuition and fix the repercussions of those decisions with more rationally sound decisions when/if they backfire.
Personally, I'd rather have dealt with the blowback of Donald Trump's corpse rotting in a shallow grave than having to deal with where we're at currently.