Just ask the protestants and the catholics.
Just ask the protestants and the catholics.
However, we can sometimes mistake _subtle_ differences for _small_ ones; but just as there's a substantial difference between the Mac OS and Windows, there's a substantial difference between Catholicism and Calvinism (which was the most successful form of Protestantism) -- the difference between God seeing that you went to Hell, and God sending you there. I could go into much greater detail (I count nine paragraphs in how I'd previously structured this comment), but that's the nutshell of the nutshell.
There's a joke about that, I looked it up:
I was walking across a bridge one day, and I saw a man standing on the edge, about to jump off. So I ran over and said “Stop! don’t do it!” “Why shouldn’t I?” he said. I said, “Well, there’s so much to live for!” He said, “Like what?”
I said, “Well, are you religious or atheist?” He said, “Religious.”
I said, “Me too! …Are you Christian or Buddhist?” He said, “Christian.”
I said, “Me too! …Are you Catholic or Protestant?” He said, “Protestant.”
I said, “Me too! …Are you Episcopalian or Baptist?” He said, “Baptist!”
I said, “Wow! Me too!…Are you Baptist church of God or Baptist church of the Lord?” He said, “Baptist church of God!”
I said, “Me too! Are you original Baptist church of God, or are you reformed Baptist church of God?” He said, “Reformed Baptist church of God!”
I said, “Me too! Are you reformed Baptist church of God, reformation of 1879, or reformed Baptist church of God, reformation of 1915?”
He said, “Reformed Baptist church of God, reformation of 1915!”
I said, “Die, heretic scum” and pushed him off.. — Emo Phillips
Calvinism had _huge_ practical consequences -- in social policy, it's the difference between ensuring that the poor are fed and sheltered, and kicking them into the street; and you can only imagine what it meant for the laws of war...
Edit: And the joke you mention is only too recognizable, but it's more like the Catholicism-and-Orthodoxy situation, where it's a matter of tribal loyalties more than views of the world...