Since I like to quibble, John Divivo seems to fit the bill. Shot both pilots, killed one, and tried to crash the plane after his hijacking demands were rebuffed. I don't know for sure he was christian, but since this was the early 70s it is possible he identified as such.

Anyway, "Guido fit the profile"?  Look at https://economics.sas.upenn.edu/sites/economics.sas.upenn.edu/files/imagecache/faculty_main/faculty_images/menzio.jpg

"Had the unthinkable happened, the lady would have been the smartest passenger on the plane". No, she still would have been on the dumb side for mistaking an Italian for Arab and integrals for Arabic. She would have been lucky is all. Is someone that goes the wrong way down a one-way street and hits a robber smart or lucky?