Substantiate what? My personal feelings? I don't think that one can provide evidence for one's "feel" of a person.

The specific charges. If you don't like him you should have just said that. Do you call everyone you don't like a "self-centered cult-leader"?

I said he's attempting to be one. My rationale for that is his statements that make him seem to be basking in martyrdom. See my comments above in reply to another comment.

I call people I feel to be self-centered self-centered. I call people who try to convince other people that they're an innocent messenger for truth while demonizing anyone who says anything bad about them a wannabe cult leader.