Religion, schmeligion

What I'd like to know is why, when religious people ridicule me for being a heretic, I do not get offended in the least (and in fact, would probably agree with them), while if I were to ridicule them back for being religious, the air would deaden with the kind of frigid, nailbiting silence that an overpowering vacuum makes: the kind that can only be filled with a large and extremely sincere apology.

When people come up to me and tell me "There is a God", that's religious preaching, or practiced enlightenment. When I go up to people and say "There is no God", that's hereticism, and I might be shot, or shot down, or be at the very least replied with gasps of horror.

Maybe I'm just less easily offended. And here I was thinking that religion was a way to feel less insecure...

The (ironic) disclaimer: if people are offended by religious views, don't read this, nothing bad was intended, yadda yadda.