It's almost as if this person justifies killing Jews because they have religious freedom. 
The reason it is not atheist only is because only being selfish to prove there isn't anything else out there to think about is a bit short sited and pathetic. Science has a design to it just like the makeup of your brain. You can't just have an explosion create organisms. Even if it isn't that simple, we don't believe you are smart either. As an atheist you only continue to show your constant hate and discrimination against people different then you. That is not exactly what Jesus taught people to be like.