Best I can figure, the way this plays out: Allowing him on the ballot may cause a constitutional crisis. If he wins or is kept off the ballot it does cause a constitutional crisis. Conservatives want a constitutional crisis.
And, this is what happens when we allow right-wing fascists a platform. They use it one way or another to fuck everything up for everyone. That coupled with the way the Supreme Court nomination process has been undermined for the past 9 years, and the complete theft of the Judicial Branch, sure looks like a failed state BINGO just waiting to happen. Just have to hope he loses, I guess.