So now it's OK in the UK to have your daughter or sister raped and murdered if she hangs out with unmarried men? 
So, what if a Muslim commits an act against me that is a crime under secular law but is allowed under Sharia law, and I behead him which is legal under my religion because I (hypothetically) follow one of those religions that thought the crusades were a good idea? Do I get a pass, praise, or prison?
What religion is that? You cant be talking about Christianity because no-one at the time thought the Crusades was a "good idea". Nor did anyone with any sense think they were " a good idea to make money on".
Actual history reveals The Crusades were purely defensive actions against a religious movement that was sweeping west into Europe putting non-believers to the sword and stealing for their ownselves. The truth is since the days of Mohamed, Islam, has always been a religion of conquest. The Christian Church, Kings, Princes..ect who back the Crusades all lost money big time, and only one crusade had any success anyways. The first one.
But thats another historical make believe that has swept the world. That Christians of the day engaged in the Crusades to get rich and to persecute another religion. What a crock! The Crusades were a last ditch attempt to save what was left of Christianity from an enemy that was swiftly conquering the western world.