It's pretty standard for these types to live lives of constant and heavy drug and alcohol use to suddenly find Jesus, trading one drug for another. Then they go through this stage of saying stupid things and being exactly the opposite of who they originally were. See also Alice Cooper, one of my favorite rebels from the old school era who is now a disgusting Republican schill.
Megadeth has sucked ass for years anyway. Rust in Peace was the last album that was worth a shit. And interesting to note, if you watch any of his early videos, he's the only one you really see. We used to joke as teenagers that they should just call the band MegaDave as he was such a fucking egomaniac.