steveh_131
Grandmaster
Choosing fantasy over reality is the definition of delusion. If your god is real, you may not be delusional...but otherwise, in fact you are.
The distinction between a delusional mentally ill person and a person that practices a religion based on fantasy is that one of those people has a good reason to be delusional.
Is Christianity a delusion? From my perspective, yes...but I am not the final arbiter of these things. I could be wrong.
By this logic, your denial of a God or any life beyond this one is equivalent to a religion - and if you're wrong then you also meet the requirements of delusion.
Then when an atheist goes on a killing spree I could make some comments implying some equivalence between you and him.
Fortunately, I don't subscribe to this. A delusion is an irrational belief, by definition. Two reasonable, rational men can assess the evidence and reach opposing conclusions about the existence of God. That disagreement does not make either one of them delusional unless they've rejected the tangible facts of reality to arrive there.