Unfortunately, there were only 7-8 Crusades with only the first four being major, but 528 major pitched battles against Musselmen on European soil.
The end result was a net loss for the Christians, and a net gain for the Musselmen.
Now that the Musselmen period of hudna has ended, the jihads begin and with that comes the taqiya to lower the non-Musselmen guard, making them easier to kill.
The girl is just practicing the highest calling of her faith with taqiya, as was her brother in jihad emulating Mohammad.
Islam will continue until Mecca & Medina are destroyed utterly, finally proving to all Musselmen the rock god is not absolute: the Last Crusade.