They'll all be dead soon so let's not get our knickers ina knot.
If you allow terrorists to operate in your country then you had better be prepared for the international community (I'm afraid that mean the US these days) to step in and wipe them out. The only way to avoid such conflict is to weed them out yourself. As for Israel, I don't recall a vote on that one, it was the original version of the UN that said they could take some land because they were "disposessed". Not the UK of USA. If that holds up i court then every aboriginal in the world can claim back the lands of thier ancestors.