Human nature being what it is, most people will look out for their interests first. That said, in this case it affects people of all religions so there is a common uniting issue. It is better when, in general, people of all religions can find common ground and work together on things, but you always have the extremist sects in most of these belief systems where the ideology is "there is only one true belief system and everything else is wrong and must be converted or eliminated". The key is having a moderate majority to counterbalance that. IE: I believe in Christianity, Islam etc., but I respect your belief in "name the alternate religion", see you as a good neighbor and am open to having respectful discussions about our differences if faith for understanding.