I think that anyone crying foul/unfair due to a judge's religious views makes the same amount of sense as crying foul/unfair because of a judge's orientation. Just as it was absurd to question Judge Walker's ruling because he's not straight, it is absurd to question the ability of any judge based solely on his/her religious beliefs.

Any judge worth his salt knows better than to judge civil law by the tenets of the Book of Mormon/Bible rather than by the requirements of the Constitution. It's not like this is the first time they will have been asked to review a sticky moral-political issue, and I'm sure that if they feel they cannot sit in judgment without a conflict of interest they will step down and let another judge sit on in their stead.