Dave is a far-right, born-again Christian who spends time with Alex Jones. Megadeth won't play songs like "The Conjuring" or with bands that are "too Satanic". He may have calmed down but his views are still deplorable. I like to think he was replaced by a body-double after Countdown was released.
I mean, to me personally I find it silly to hate someone for their lifestyle choices as long as its not hurting anyone and they're not being outwardly offensive. I consider myself to be leftist, but I'm not going to instantly dislike someone because they're on the right, and I've met sane right wingers (I know in this case you're referring to him being far right) and I don't see anything inherently wrong with being a born again christian. I'm also not religious myself, but if that helped him kick drugs and lead a healthier and less aggressive life style more power to him and others that find solace in religion. Though I do think his aversion to playing his old music and with other bands is silly, you can't really blame him for being devout to his religion. As for the Alex Jones thing, that's something that's new to me, though it seems like he only did an interview on the show in 2012? and even then 2012 Dave seems pretty different from current Dave. I'm not going to watch the interview because I'd prefer to avoid anything Alex Jones is involved in, but is it the fact that he appeared on the show what bothers you or the content discussed in the interview? if its the former then I also personally find that to be silly, if its the latter then I can't fault you either.
I certainly prefer early Dave in terms of his political views and music (for the most part. I thought Dystopia was great) I can't really hate a dude for turning his life around, even if its one that doesn't really line up with my own. That being said he's said plenty of unsavory things that I wouldn't blame anyone for disliking him over, but again he seems to have shut up about all that though Dystopia lyrics are suspect.