Yes, you are wrong. The Crusades were a just cause, an effort to repel the muslim aggressors. The goal wasn't to convert them by force though as Christians they certainly were willing to try and "save" the savages capable of becoming human. Good for them.

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Qur'an:8:39 Fight them until all opposition ends and all submit to Allah.
Qur'an:8:67 It is not fitting for any prophet to have prisoners until he has made a great slaughter in the land.
Qur'an 8:12 I will terrorize the unbelievers...Strike off their heads and cut off each of their fingers and toes.
Qur'an 9:5 Fight and kill the disbelievers wherever you find them, take them captive, torture them, and lie in wait and ambush them using every stratagem of war.