If the UK had been one of the parties to the exchange , then we would have a reason to be concerned at the terms. As it is, both parties thought they were getting a deal they wanted and offering in exchange something they could give up - that's what exchanges are all about. As to the rights and wrongs of the dispute and what can be done in the future, I increasingly despair. There is no absolute right or wrong on either side and it is up to each person involved to examine their own conscience as to how best to proceed.
I do find the positions taken by some people on this site to be a bit contradictory, however. We have a number of correspondents who object to unregulated incursions of foreigners, taking over large portions of our cities, changing our cultural balance and potentially even changing the very nature of our legal and democratic framework - welcome to the world of post WWII Palestine!