Even if You Believe in the Bible's Mythology, You Would Then Believe That. God gave the land to the descendants of Abraham, through his son Isaac and grandson Jacob. Many Palestinian Jews converted to Christian and many of these later converted to Islam. The European Jews are largely the decendants of mixed marriages and conversions. Which is why Palestinian Christians and Moslems look more like Palestinian Jews than the European Jews do. Or for that matter, the black African Jews.
from the article: Major breakthrough expected in Itamar massacre investigation