I thought for a long time that they were insane. But it turns out that they are just evil. There is no reasoning with an insane person and there can be no compromise with an evil person.
This disgrace to the human race keeps saying evil things, KNOWING that what he says is false, and no one takes him on. He is not the only one; just the most obnoxious.
Your analysis is correct. Grayson is nuts/ignorant or lying/soulless.
I happen to believe it’s the latter.