I try my best not to respond to these people.
I doubt I'll change their line of thinking and they SURELY won't change mine.
I had a girl that would constantly say, "It's such a shame you didn't have the experiences I had with god. It's such a shame he didn't come into your life."
I'd just say nothing.
Sorry, but these religious quacks have what Darrel Ray calls a "God Virus". They have been so indoctrinated, that after awhile, if you hear the same lie over and over and over again, you subconsciously begin to believe it! It's as if a filter develops in the brain which lets in only religious bullshit and filters out reality! Try and have a rational reasonable discussion with most religionists and it's like beating your head on a brick wall full of spikes! As the meme develops from childhood you are unable to see any other viewpoint as making any sense. Your views, backed by the church and right wing wackos seem to be the only true answer to you! Reality and science are meaningless to these type of people as they continue to live in the dark ages. It will take hundreds of years of eduction and mass media exposure to even begin to undo the damage religion has done to mankind!