Why are atheist...atheist?

[DaveD]

As I've said, ignorance is pretending you know what you do not know.

Oh, the irony.

One thing is certainly ironic, atheist are just as prone to sarcasm and close-mindedness as religious people as your cowardice response, and ridiculously immature and offensive signature pic as well, have shown.

If you're referring to anything I've said that implies I think know something, when I know I do not, then back up your remark with a quote and explain how it shows I'm ignorant by my definition.

In your OP in this very thread you made some assumptions about what atheists "believe", and kept waffling about a " choice of atheist to deny the existence of God", and other assorted drivel. You appear to ignore what others tell you, and continue to appear condescending, including calling me a coward.
As for my avatar, you may have given the game away there. You claim not to be religious, but why then would you find it offensive?