Real reason: They call themselves Jews, but are really the Synagogue of Satan.
Many Jews despise Israel, because they are more about Socialism than Judaism.
In Europe before WWII, Jews were classified as two types: Zionists and the Jewish Labor Bund, which was Socialist and Secular in nature. The Bund eventually came to strongly oppose Zionism, arguing that emigration to Palestine was a form of escapism.
Whaaa?....seriously?
Bingo.