Mr. Abbas wasn't talking about palestinian concessions, he was talking that an israeli offer, unacceptable to palestinians was introduced by aljazeera as a palestinian paper, and that the israeli unacceptable offer suddenly became palestinian concessions which is untrue. the palestinians made a counter offer if you're wondering, the israelis refused it. these are negotiations, and once we come close to a shared view, israel's government collapses, happened all the time, will happen if netenyahu reaches understandings with palestinians, and will happen in the future, all while israelis build settlements and empty jerusalem from palestinians.
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from the article: Abbas: Concessions in Palestine papers came from Israel, not us