Well, I think it might be. You know, if he was raised in a strict, fundamentalist home of whatever religion, he may have experienced guilt or shame for his sexuality. He may have even been physically abused (spare the rod....).
Please, nobody misunderstand my reasoning here. I think that religion and faith are wonderful things and I have seen the positive effects they have had in people's lives.
But I also know that religious extremism in any form can be dangerous and arguable responsible for creating some pretty notorious socio/psychopaths.
It's a valid thing to look into as far as sleuthing LM. What values was he raised with? How did they shape his emotional growth? Does he leave clues referencing religion that may point to other crimes?
FWIW his brother (who's last name is also Newman) lists his religion as Christian on his Facebook account.