@ June, It's not that Jesus approved. It was the Israelite God who approved. The God and Father of Abraham, Isaac & Jacob.While the Christians were busy murdering the Jews and others as heretics, they must have been certain that Jesus approved, or they would not have risked from their own perception, their own salvation ... would they???
The nation of Israel had murderd his son through the government of Rome.It was your religious leaders who murderd the Messiah. The Messiah that God had promised. Prophecy,is likened to "The Will of God" If i was a Jewish man, i would probably be a atheist by now.
It's easy to blame a religious movement like Christanity.Because, Israel had peace and were protected by the world's great Roman Empire.So from your perspective i can see your point.
To me, the RCC and its Pope are to blame for all the mayhem and bad ill feelings that have fought the many murderious wars in the name of Christanity at the time of the crusades.