And you know who he voted for, how? I thought our vote was protected. I can register as anything I want and I know a lot of people who will register the opposite of what they regularly vote. They do that so they can vote in the oppositions primary and vote for the least favorable candidate. Then they vote their party in the generals. You do know that no one holds a gun to your head and makes you vote the way you register, right?
There are also a LOT of Republicans that despise Trump, just as there are Democrats who adore him. Ditto for the different sexual, ethic and racial groups.
It's also been said he is anti-fa and bragged about it before the FBI shut down his SM. They should just leave it up, but why do that when the rumors are so much more fun than whatever the truth is?
There are plenty of right-wing and left-wing extremists to fill a stadium, and no one can claim that "their side" would never do such a thing. Because they have, multiples of multiple times.
And some people feed that hatred, division and mistrust from both sides of the political aisle. Both sides are as bad as the other, because neither side has any reason to act decently. If there was a viable third party, behaviors would change, quickly.