I cannot speak for all religions, but IME Christians are decidedly "less nice". Ziddina hit the nail on the head regarding the driving habits of people driving Jesusy autos. The driving here in the Triangle of North Carolina is the worst in the U.S. People here drive like Jesus will magically save them from their utter stupidity and, if he does not, then they get to meet their sweet lode anyways, so it's OK to drive like their heroes from NASCAR.
Off the roads they tend to be much more judgemental, hypocritical, and just hateful than I would like. It seems like the enforced religious activities and constant guilt tripping cause a sort of frustration in some people that is internalized and then expressed in their secular lives.
Non-religious types, on the other hand, IME, are open minded and actually consider the well being of those around them. They actually value the life we live in the here and now, not seeing it as some kind of hellish testing ground for the "real life" to come. They view things through a much clearer lens, and if they are good willed, they ACT to make this place better, as opposed to complaining about how bad things are and how Jesus must be coming soon to make it all better.
I know that there is the whole spectrum of niceness on both sides, but at least unreligious people are not hypocrites. I cannot wait to drive out of this so called Bible belt and NEVER come back.
