Here is a detailed analysis of the evolution of Obama’s views on the Israel-Palestinian issue. For anyone who wishes Israel well but is still supporting Obama, you owe it to yourself to read it carefully. The author clearly demonstrates how the left’s hostility toward Israel is part and parcel of their generalized hostility toward Western societies.
The title that was given to the article…”Pro-Palestinian-in-Chief”…seems questionable, though. Supporting the “Palestinian cause” in the way that Western leftists do is not really pro-Palestinian, at least not pro-those-Palestinians-who-want-to live peaceful and happy lives. Great harm has been done to these people, as well as to Israelis and to the world in general, by the way in which the Palestinian conflict with Israel has been hyped and romanticized. It is specifically the insane focus on anti-Israel beliefs and action which has acted to prevent the economic development of the Palestinian areas and ensure the continue immiseration of its people, and all of this has been greatly aided and abetted by American and European leftists.
See this related article by Fouad Ajami, which contrasts the behavior of the Palestinian leadership with the behavior of pre-statehood Israeli leadership.