Since I'm an atheist I don't believe in God(s). However, if I were to say something to him, I'd say "So I guess I was wrong... but I don't care, send me to hell for eternity as I would rather not be in the same plane as my tormentors (aka pro-lifers) nor would I wish to be a blissful sycophant!"
I'm sure there are many other things I can say, but that would be one of the things that come to mind..