By your argument, all Jews should move to Israel to be safe. And, I suppose, all Mormons should move to a state of their own. Ditto for Zoroastrians, of course.
But in history, more Jews chose to move to the US than to Palestine, so they disagreed with you, and most Jews who were expelled from their homes in the 20th century were expelled after Israel refused to allow the Muslims who fled for their lives to return.
Your notion that there would be no Jews there if it was an international land is obviously mistaken; there were Jews there before the birth of Zionism. Jews and Muslims generally lived in peace before European Zionists decided they needed to take a Middle Eastern land.