I grew up with 10 years of catholic school. 11th and 12th grade were public school when I moved.
I think people are different. There are a lot of people who use religion as a free pass to support invading places for oil, putting people to death, etc.
I don't know that Jesus would have voted to invade Iraq because in 5 or 10 years they might have weapons. We did a whole lot of "pre-emptive" killing and in the end, it seems the only thing that is different is a lot less people in iraq, and we have bases set up near oil fields.
So who knows.