I carry a snub revolver more than anything else and believe it to be adequate and a great personal defense weapon, but my primary goal is avoidance and disengagement.

If I was responsible for protecting others, I would definitely opt for a high capacity autoloader.

It is with good reason that law enforcement switched to high capacity semi-automatics. In the context of an attack on a church, I would have the mentality that I would likely have to be ready to defend against a homicidal/suicidal individual likely armed with an assault rifle or at least a high capacity handgun and possibly wearing body armor. I just can't see wanting a revolver in that scenario. That's just my perspective, YMMV.