Objections to Christianity?

Why can't we all just accept that not everyone can have the same idea about religion and leave it alone? I am not a Christian. I am an Atheist. I am not going around trying to convert people to Atheism. Do you know why? Because I have accepted that people are going to believe what they want. And why not? It is a choice that is theirs to make, no matter how much I think it is ridiculous.