International Law specifies that when land is acquired in the course of being attacked and defending itself (ie. Israel in 1948, 1967 and 1973) it is within its rights under those laws to retain those lands. That law applies to every other country but obviously not Israel (in your selective justice system).
Pope Francis: Priests in Holy Year can absolve 'sin of abortion' (AP)
from the article: Dividing the Land of Israel into two states is a moral imperative