This is an essay by Jon Trott of Jesus People USA about Jonathon David Brown[1], an audio engineer for Petra (and many other Christian bands), who was a member (and funder) of the KKK and other white identity groups.

The essay goes on to look at some of the racist streams at the heart of evangelical and Pentecostal Christianity; it is long, but worth a skim.

1: https://en.wikipedia.org/wiki/Jonathan_David_Brown