The grace of God will show all around a genuine presenter... and really this is what these folks are. They are presenters of the gospel, using a non traditional format.
Dave Mustaine still plays the same heavy metal as always but refuses to tour with blatantly anti Christian bands, is still married to the same woman after some 25 years, is a good dad, stands in support of Israel, opposes gay marriage etc.
He’s got a less than stellar past (Kicked out of Metallica for being a drunk) but says the bible is what saved him. He was also home schooled which probably made a big difference.