"Their land"... if there is something that the Palestina and Israel conflict has remembered us is that nobody owns anything that they can't defend. The Americans killed the natives and then future generations don't think that it matters because they weren't directly involved in that; the same thing happens in this conflict that haves already many years in the making.

People entitle themselves to land for no logical reason; nobody thinks: "This country haves 40 million people an there is 7.053 billion people in the world; therefore we should only own a 176.325th of the available terrain"; never happens.