However for all of their general awfulness, the Religious Right criticism of metal is quite valid due to its frequent promotions of neo-Nazism, misogyny, and suicide.
You forgot metal promotes the Cult of Satan.
https://www.youtube.com/watch?v=DbEShASPgME
Yes, which is also awful and right-wing because the Church of Satan is basically a bunch of Randians who are trying to appear even more "edgy".
Do you have stats on this?
And I'm not sure why everything you happen to dislike is in an ideology you dislike. Life isn't usually that convenient.