A Jew visits with his rabbi, looking quite distressed. It takes him a bit to open up, a lot of prodding from the older man, but eventually he says, "I'm upset, my son has gone and become a Christian!"
The rabbi sighs and shakes his head sadly, clicking his tongue. "I know your pain, friend. A few years ago, my son did the same. He is now an Episcopalian!"
Both of them stew in their distress for a bit before finally facing down God. They say, "God, our sons have gone and converted to Christianity!"
God sighs, slumps on their throne, and says, "You guys are never going to believe this..."