We can assess his brain for abnormalities during autopsy. Until then, we should treat a world leader as though everything they do and every outcome it has it calculated and intentional: Through that lens, which is the only lens worth considering, Trump is a domestic terrorist, traitor, insurrectionist, enemy of the US of constitution, rapist / child rapist, and many, many more. He should be charged, convicted, and sentenced to the according to the absolute most severe extent of each crime he’s committed.

This whole “oh he’s crazy” or “stupid” or “incompetent” etc all just mitigate his culpability. What he is is fucking guilty - everything else is moot.