Michael Lerner and the Inconvenience of Guilt

Steven Salaita's piece, "What is Michael Lerner Really Talking About?", condemns the attempt by some liberals and progressives to place the blame for the current situation in Palestine/Israel equally in the lap of both Zionist and Palestinian. He stretches the argument to be part of a larger critique of white liberals who have greased the wheels of colonialism along the way. Salaita uses white liberal academics somewhat as a punching bag to prove his larger point, but it's one worth considering. Is the Israeli-Palestinian debate excluding critical Arab voices in favor of those who only claim to speak for them? Or is Salaita being stubborn in demanding that Lerner and company be abandoned by those in favor of Palestinian self-determination?