the western allies certainly could and should have done much pre-war, and arguably in the war (mosquito strikes on the camps, for example). my point was that few can dispute that, as we see today, the whole imposition of israel on its neighbours has been a disaster.
that's only when taking only palestinians into account. When the balfour declaration was signed already 10% of then population was jewish.
Mass killings of jews had already started in eastern europe decades before the holocaust. which was what prompted zionism. This is not a singular event, but a movement that would happen with the british or without them.
And any result of the conflict would cause serious "disaster" for one people or another
