That may be so, there is no problem with the (very few) jews who never left. Those who 'came back' however and displaced the Palestinian inhabitants, were Khazars, relatively recent converts to Judaism and certainly without historical claim to the land. Read Shlomo Sand's Invention of the Jewish People for the full story.
U.S. State Dept. condemns 'vicious terrorist attack' that killed Palestinian infant (Haaretz)
from the article: Netanyahu seeks to legalize outposts built on private Palestinian land