So - ignoring the time he sent a mob to try and overthrow the US government, how about we use the fact that he literally said he’d be a dictator?
Or maybe the fact that his legal defense against trying to overthrow the government was that the President is immune from all crimes. His lawyers even literally said he could have his political opponents murdered, and so long as the surviving politicians don’t impeach and convict him he can’t be held liable for it.
They’re arguing a legal framework under which he can murder the opposition, and then kill anyone that tries to remove him from office.