About the whole stalin and hitler thing (read the whole thing or don't answer at all)?

how does stalin's actions affect me. id also like to say hitler was roman catholic and used the whole mel gibson argument. second of all i hate stalin, atheism is not a religion and is only used to describe the fact that you don't believe in god. so if one atheist does something bad it does not affect other atheists. i cant say the same thing about religion because religion is a structure of social code. and is a group effort. whats so hard to understand about that.