Israel’s references to justice are absurd. There is no justice in international relations, but only the balance of power. What justice is there in refusing nuclear weapons to Iran? It is a sovereign state as much entitled to nukes as Britain. If anything, Britain is responsible for more Jewish deaths than Iran, and the latter would never nuke Israel.
Why should we care about justice? Thirty years ago, Egypt was actively pursuing its nuclear program. It acted even more illegally than Iran: instead of building its own centrifuges, it enriched uranium in China with Russian ones. Now Egypt pursues an ostensibly peaceful nuclear program. Suppose it were to be revealed that Egypt builds nuclear weapons whose only target is Israel, should we care about the legal issues of the peace treaty or simply bomb the Muslims back into the age of the pyramids?
Likewise with Palestinians. There is no justice in giving them a state—or otherwise the 6,000 linguistic groups on the globe would be entitled to 6,000 states; Palestinians are not even a linguistic group. Allowing Palestinians a state is actually unjust toward their thousands of Jewish casualties. The only reason the Palestinians get a state is that Israeli rulers grew frightful, unwilling to expel their enemies and oppose anti-Semitic world opinion.
Justice is an intra-group phenomenon: we concede our immediate interests in order to further the interests of our immediate neighbors. With other groups, we compete or fight. There is no imaginable reason to deal with them justly—that is, to concede our interests in their favor; they would never reciprocate. And even if they would, what they can offer us in place of Judea?
In the Torah, there is no concept of justice, but only of righteousness, doing unquestionably anything commanded by God. Abstract justice for its own sake is alien to our religious thought. The nations of Canaan were undoubtedly justified in defending their land against Jewish invaders, yet God uprooted them, expelled them, and told us to kill those who opposed his will. Killing babies in Midian and Amalek was as unjust as it gets, but we have done it on God’s command and were blessed for doing that.
“Is it good for the Jews” is indeed utterly the wrong question. The proper one is, “Is it good for Judaism?” Cleansing the Jewish land of its enemies is undoubtedly good for our faith.