Obama's speech and divisions in the Arab world

"President Obama, in his speech on Thursday about the changes in the Arab world, spoke directly to that feeling. “Divisions of tribe, ethnicity and religious sect were manipulated as a means of holding on to power, or taking it away from somebody else. But the events of the past six months show us that strategies of repression and strategies of diversion will not work anymore.”"  Look at this sentence: as a quotation in a front page article in the New York Times and as a passage in Obama's speech.  I mean, there is no need for a comment? No need to address the external factors in deepening and stoking Arab divisions? I mean, has there been any government (internal or external) that has done more to instigate sectarian, ethnic, tribal, and religious conflict in Iraq than the US itself?  I love how Western colonial powers operate.  They go to a country and they prop up half-dead tribal elders, and then they say: those societies are tribal.  I saw that in South Lebanon in 1982.  Leftist and Arab nationalist organizations have taken over most villages in South Lebanon in the 1970s and have marginalized the old traditional familial and tribal leaders, so the first thing that Israeli terrorist occupiers do is to prop up those old traditional leaders and give them powers.  Many of those folks were men in their 80s---kid you not.  And after Wikileaks, do we have doubts about US manipulation of sectarian divisions in the Middle East in cooperation with Saudi Arabia?  Who are you kidding?