A lot of, if not most of, the current tension in the Middle East dates back to just after WWII, when someone decided it would be a good idea to stick all the people that no one wanted (but wouldn't come right out and say it) in the middle of a bunch of people who were ill-prepared to absorb them (and didn't particularly want them, either).
That pretty much paved the road to our current little slice of Middle Eastern hell.
Take any news report about the middle east and replace the names with cananites, babylonians, persions, egyptians, romans, etc - the story doesn't change.
In fact if you read any books by Josephus - it sounds just like CNN (except better written)
Much more substantial were the efforts of the US government to overthrow moderate regimes for hardlines who would support them, as well the UK's efforts to deliberately screw up the decolonization efforts by drawing up national boundaries with no regards to the inhabitants' will.
It's complex, but it's ridiculously easy to see where things were wrong, and you don't need the hindsight either.