The only problem with that, he isn't a Christian. In a letter to his mother he wrote about his prison experience printed in a USA Today article.
"Many good people continue to send me money and books," Rudolph writes in an undated letter. "Most of them have, of course, an agenda; mostly born-again Christians looking to save my soul. I suppose the assumption is made that because I'm in here I must be a 'sinner' in need of salvation, and they would be glad to sell me a ticket to heaven, hawking this salvation like peanuts at a ballgame. I do appreciate their charity, but I could really do without the condescension. They have been so nice I would hate to break it to them that I really prefer Nietzsche to the Bible."
But there was not a word about how his radical athiestic views ("God is dead") were the cause of his evil - unlike when the press thought he was a Christian extremist.