How did they become enemies..
Palestinians,, (Christian,Jew and Arab) lived peaceably for the most part till Zionists invaded/infested the area.
As with ALL those other countries,, outside instigation is the cause of the fighting.
Israel has only existed since 1948,,, and has been stirring shit the whole time.
The Zionists started shit in the late 1800s when they came into existence.
They are a curse on the Jewish people and the world.