Muzzies have long memories——they will obliterate any episode
in history that they believe reflects badly on them——if we let them.
The Crusades were organized by western European Christians after centuries of Muslim wars of expansion. Their primary objectives were to stop the expansion of Muslim states, to reclaim for Christianity the Holy Land in the Middle East, and to recapture Muslim territories that had formerly been Christian.
Started out to provide safe corridor etc for pilgrimages to Jerusalem