Attacking faith-based movies for their Christian theme

I don't understand why this website allows people get on here and attack faith-based movies for their Christian message. Is that what this website is about? It baffles me, in the first place, that folks that are non-believers would waste their time watching movies about Christianity, if it's something they don't believe in and it angers them. I am a devout Christian and I would not watch Bill Maher's Religulous, for instance, because I know it attacks something that is very near to my heart that believe in whole-heartedly. But alas, people have the need to waste their time and watch movies that are obviously going to anger them, then get on here and attack the belief in God instead of critique a movie based on...proper stuff. I thought folks were only suppose to critique a movie based on regular ol stuff like plot, acting, score, special effects, etc. Why do you allow people to get on here and turn this into some kind of hate forum? Would you allow someone to attack a movie about the black culture with a bunch of racists hate and comments against African-Americans? If not, then why do you allow the attack on Christianity with such hate, just wondering?