not everyone can live in Tel Aviv and the Gush Dan! Rents and housing prices are sky high in the centre because it is too densely populated. It's the same as Tokyo, London, NYC, Paris, and Moscow. If the Arabs in the West Bank were to be repatriated to Jordan or Saudi Arabia- from where they originated, there would be vast tracks of land for new housing!
UN: Gaza could be 'uninhabitable' by 2020 if trends continue (AP)