But, Trump lost respect when McCain sided with the Democrats during legislation that needed complete party unity

It blows my mind how most MAGA folks try to rationalize every despicable thing Trump says. He lost respect for McCain because of a disagreement on legislation., Yeah, that justifies verbally attacking a veteran.

Then for good measure, let's throw in things that Obama and Clinton did, completely unrelated to Trump and McCain.

Trying to defend the indefensible doesn't work.