Athiests tend to counter this by saying, "Yes, but there are SO MANY claimaints to 'god' so if I choose the 'wrong one' I am going to hell. How do you know your 'god' is the true one?"
I.e. they answer the dilemma by a counter-dilemma. Of higher multiplicity.
The answer of course is to snicker, as though they ever *really* considered Zeus as an option.
(Given the claim that all religions are man-made though, I would consider the best evidence of a man-made religion one to be which caters to people's self-importance and allows unrestricted sexual behaviour. And lo and behold! It's the modern secular Democratic Party!)
Cheers!