Christians if you love thy (your) neibor then how come........?

You are always fighting with your fellow brother the atheist? Or the Catholics? Satanism? How come people are trying to force their beliefs on people who don't care? Like for example the theory of Creationism? I remember that whole dispute over whether or not Creationism should be taught in school. I say that was a big waste of time. The theory of evolution is far more important, don't you agree?