Once I saw this guy on a bridge about to jump. I said, “Don’t do it!”
He said, “Nobody loves me.”
I said, “God loves you. Do you believe in God?”
He said, “Yes.”
I said, “Are you a Christian or a Jew?”
He said, “A Christian.”
I said, “Me, too! Protestant or Catholic?”
He said, “Protestant.”
I said, “Me, too! What franchise?”
He said, “Baptist.”
I said, “Me, too! Northern Baptist or Southern Baptist?”
He said, “Northern Baptist.”
I said, “Me, too! Northern Conservative Baptist or Northern Liberal Baptist?”
He said, “Northern Conservative Baptist.”
I said, “Me, too! Northern Conservative Baptist Great Lakes Region, or Northern Conservative Baptist Eastern Region?”
He said, “Northern Conservative Baptist Great Lakes Region.”
I said, “Me, too! Northern Conservative Baptist Great Lakes Region Council of 1879, or Northern Conservative Baptist Great Lakes Region Council of 1912.”
He said, “Northern Conservative Baptist Great Lakes Region Council of 1912.”
I said, “Die, heretic!” And I pushed him over.
Attributed to comedian Emo Philips.
See also Freud's "narcissism of small differences".