My question: how come he didn't make a movie about the Navajo, or the Sioux? Why didn't he make a movie about the ancient Egyptians, or the Indus Valley civilizations? The Crusades? The Napoleonic Wars?
Why didn't he continue "The Passion" with the story of the Resurrection and the events in the Book of Acts?
I believe the answer lies in the fact that none of these could have included bloody human sacrifice, and I will leave it to the psychologists to determine why someone would dwell on such stuff.