Cause and effect (in relation to the Arab Israeli war in your instance) are always good, as historians must speculate a little bit to come up with answers. As such, we arrive at a wide range of different opinions from different historians. Either would be suitable. (In the question I would include the word "historians" (as in "what have different Historians...blahblahblah); or failing that something like "How have interpretations changed/how do interpretations differ"...).
That human rights one would also be good, as there is a lot of debate in the current situation about who is responsible for the deaths of innocent Palestinians.