The modern Christian Church will tell you that Torah has been done away with and we are saved by Grace alone, with no additional effort required. The original Apostolic Church did not believe this at all. For them Torah was the set of instructions to live their daily lives by. "Salvation" was just the beginning of the race, not the goal line. We should live the same way today!
So, what happened? It may surprise you, but the modern Church actually follows an early Heretic by the name of Marcion.
The political Left is always blaming Christians for Muslim anger and violent Jihad. The Left especially portrays the historical Crusades as if it was an unprovoked and horrific attack on the peaceful Muslim world.
The truth, of course, has never been a favorite subject of the Left.