A significant amount of this country believes that this was a fraudulent election

Too bad for them, what they believe isn't reality. If it was, they'd be able to prove it, and so would Trump in the courts. Looks like they failed miserably, so resorted to storming the Capitol to try and physically stop it instead.

Some people protested.

And some people directly called for (civil) war based on the lies of Trump's administration regarding election fraud. This moron was one of them.

He was leading the polls in Michigan

A completely and utterly irrelevant fact. If you break the law, you can and should be arrested and tried. Are you implying that politicians should be immune to due process?

Seems third world dictator dirty to me.

Like all the idiots you mentioned in your first sentence, what you believe has no bearing on reality.