I'd just like you to know that there's an entire generation of people laughing at you, all around the world.
PS: I'll go ahead and post your possible responses for you: "And I'll be laughing from The big special happy super fun place in teh sky while youre burning for ever and ever and ever and ever and ever and ever and ever and ever and ever in a giant pit of fire that has all your worst fears in it!!1"
Or, you could play the "holier than thou, I pity you" card, and say something like "I feel bad for you because you refuse to accept TEH WORD OF GOD! Im here if you ever need someone other than politicians to fill your head with complete bullshit!"