Here's a part of it: Abunimah quoted Obama as saying that he was sorry he wasn't talking more about the Palestinian cause, but that his primary campaign had constrained what he could say.
Of course his campaign constrains what he can say about how he truly feels about Palestinians.
You picked a gem of a quote. There were a few in that article. Save it because it may disappear like the Ayers one back in May or so that seems to have although there was a later one that was still up, not as detailed though.