Honestly, it's worth a read. Basically it boils down to this -- they know damn well all the things he's said about Trump in the past. None of them are new revelations to them. But the biggest one is that he would follow orders when told not to certify the election.
We're in a slow-coup. They tried jumping the gun a little bit on Jan 6th. Trump couldn't help himself. But this has been in the works for more than 20 years.