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.
There are several reasons why demilitarization was such an important part of the postwar program for Japan, but in general it was Japan had been extremely destructive for over a century.
1. The translation of the Bible
2. The development of the printing press
3. Gaining support of European princes and Nobles
It is the top one, they sought it was a source of protection