Christians and Atheists why do some of you fight with one another?

I see plenty of reasoning, they insult our intelligence, they attempt to put prayer in school, the blue law is a good one to consider, were always told were going to hell, they're against the right to an abortion, they get away without paying land tax at their churches, they are homophobic, they also try to rule people that aren't even of their group, they have slowed down the advancements in science as in embryonic stem cell research, and this is just to name a few. LOL.