David_Jay,
Certainly, the WTS version of history is - to put it very mildly - somewhat edited!
Prior to this post by fulltimestudent, I for one had never even heard of Bar Kokba's revolt of of 135 CE (and I consider myself to be something of a student of history!) Their version of Jewish-Roman conflict would have us believe that the events of 70 CE are very similar to what they claim happened previously in 607 BCE.
I don't know, though, that it was the civil war in Palestine that finally drove the British out. My understanding of matters is that civil war erupted in earnest once it became obvious that Britain was going to withdraw from Palestine when its League of Nations Mandate expired in May of 1948. In other words, the civil war was a result of British intentions to withdraw from Palestine, rather than the cause of that decision.
Britain need not have abandoned Palestine just because its mandate expired. It could have carried the mandate over as a United Nations Trust Territory, as it had already done with its Tanganyika Territory (now part of Tanzania). However, the ongoing Jewish Insurrection made it impossible for the British Administration to effectively govern the territory. This meant that while Britain didn't formally evacuate Palestine until May of 1948, to all intents and purposes its rule had ended several years before that.
(That, incidently, is the aim of guerilla warfare. For an excellent description of how a successful guerilla campaign works, as well as an even better description of how it can be defeated, Sir Robert Thompson's Defeating a Communist Insurgency is a very informative read. Also highly recommended is Noel Barber's War of the Running Dogs. I don't believe anybody can fully comprehend what went on in Palestine during those immediate post WWII years without first reading those two works on the Malayan Emergency - those by Sir Robert Thompson and Noel Barber. Although the Malayan Emergency was a campaign against a Communist guerilla army, many its principles also hold true against any other type of insurgency. And yes, an important part of a successful guerilla campaign is the Political and Public Relations / Propaganda / "Phsych-op" campaign).
That Jewish groups did use what would elsewhere be branded "terrorist" methods is readily admitted to even by such Jewish writers as the late Leon Uris (one of my favourite authors, incidentally). Furthermore, these activities continued up to and even after Britain's evacuation of the territory. For example, the UN Mediator for Palestine, Count Bernadotte, was assassinated in September 1948 by members of a Jewish terrorist unit, the Stern Gang.