The center says Edwards and the Imperial Klans promoted racial violence, encouraging members to beat and kill gays and racial and ethnic minorities, and negligently supervised his followers.
The center says the group refers to blacks as "mud people" and the "beasts of the fields."
Edwards' compound also hosts Nordic Fest, a white supremacist festival, which Cowles, Watkins and Hensley allegedly attended, according to the center. The center says members at the festival were told to kill Latinos and send their bodies "back to Mexico in boxes."
"This man is violent and he gets people around him who see him as a little God and they want to get next to him," said Dees. "Their lives are meaningless, most of them have served time in prison, they've got no families, no children that they're worried about, they're just mean-spirited human beings that are losers in life and they see Ron Edwards as a God and they want to please him."
Even if the lawsuit ends Edwards' group, Hensely said he has no plans to go anywhere.
"This ain't the last you'll see of me at all whatsoever and I guarantee that me, you'll see me all across the news and everything," he said.