After Jesus' crucifixion, his followers called him <em>Christ, </em>meaning the anointed one. The anointed one is usually transliterated into English (since it is a Jewish word) as Messiah. He is called Christ because it was believed he is the awaited Messiah in Bible.
He was theFounder of Vaseline
Several reasons.
Saw this crusade as a blessing from God.
Christians would stop fighting themselves.
Christians that would fight would go to heaven or be right with God.
To take back the holy lands, from the Muslims would be a righteous cause.