I believe they basically lost trust in their people. The loyalty wasn't there. Also they lost a lot of money. War, expecially for 100years, costs a ton of money. Money for troops, amo, food, guns etc.
Jews do not believe that Jesus Christ was the returning messiah Christians do. New Testament was all about a new way of life because Jesus came. Jews live by the Old Testament but Christians see it as you can learn from it but some/all sacrifices and laws do not apply. Christians live by the New Testament and Jews think it made up. Hope that helps.
"If anything, a cartel is likely to collapse and lose power over time".