Some of the dumbest people I know are atheists. If you really want to waste some time, try convincing one that their atheism is just as much an article of faith as anything a deist ever came up with. If you doubt that this is true of atheism, try proving that gods *don't* exist.
Of course deists have the same problem proving that gods *do* exist. But at least they admit that they have faith.
And at least religious people are usually humble. Not so the atheists. And few are quite as aggressive at trying to impose their views by law, all while denying that they have any faith at all.
Captain Ed has more to say here.
In closing, this agnostic wishes one and all a happy Easter. While the law still permits it...