Okay....but the Arabs and the Isrealites did come from the same original racial/tribal stock according to their own holy books....which are partially the same book, by the way: what Christians call "the Old Testament".

So it is a family quarrel as far as I can see. It's like 3 brothers fighting over their father's inheritance.

The Muslim faith is split by a further and later family quarrel between the relatives of Mohammed. That resulted in the split between the Shia and the Sunni Muslims.