The atheists who actually care about religion are the angry ones. The massive percentage of people who just accept you for who you are don't really care, they just get annoyed, and I'd imagine it's human nature, when someone comes up to you and tries to force their faith on you because they're 100% sure that their religion is the "right one for you". As I see it, there are two types of people, the couldn't care less people and the anal about everything people. They can be both religious and non-religious, Atheist or Christian. Some Atheists are going to be more anal about their way of thinking just like any Muslim, Christian etc. The reason why people think Christians are forcing their faith on you the entire time is because of the Christians which actually do that. There is probably a large proportion of people who would call themselves Christian but don't shout about the bible all day or even go to Church at all.