The Adam-Onis Treaty caused this.
This is a religious reason.
This desire was the motivation of the crusaders who wanted to bring Jerusalem, and other sites that witness the life of Jesus, into the hands of the Christians, and away from the Muslims, so that Christians can worship in this sites.
Answer:
2. the mongol is important to the mongol empire because it helps to show the strength of the country and helps Genghis khan spread his thoughts and the things he wants to be more advantageous