His religion does not matter. I am positive that he investigated many people who would be called Religious. That makes no difference in the out come.
It shouldn't, anyway. But he wouldn't be the first guy to start believing his own press.
In this case it is just something used to pick apart someone who was once on the side of the LE and then saw things go the other way. He is persecuted for that.
PLEASE. He's hardly persecuted. Merely called out on some of the awful things he did in this case, from making up his own "evidence" out of thin air to forgetting his own rules, how he thought he knew more than the forensic experts, and right down the line.
People want to make him all kinds of things to ignore his findings.
He did that just fine on his own. And he EARNED it. ALL of it. As far as I'm concerned, Lou Smit is a big reason why no one has had to answer for JonBenet's death. He allowed himself to be taken in by a couple of ruthless manipulators and supplied them with evidence that he took illegally. He should not have been allowed to remain on the case when his biases became obvious, and he should have gone to jail. As far as I'm concerned he can go to hell.