Answer:
The people of Europe desired taking back control of the Holy Lands for the Christians, the Holy Lands being the areas of Palestine where Jesus lived.
Explanation:
This is because in the eight century, the Muslim Empire had conquered these lands, which had been part of the Christian Byzantine Empire for centuries. This shocked the Christian world, and by the the year 1096 CE, Pope Urban decided to finally launch the Crusades in order to take back these regions.