It was from the start. He destabilized relatively benign dictatorships (Khadaffi had settled down, epecially after Saddam swung) and stacked the deck in favor of the Muslim Brotherhood, who tie in with Hamas, AlQaida, Hizb'Allah, and other lovely social groups.
The result is to have delivered the national arsenals of these countries into the hands of international terrorist organizations: doubtless, even with any attempt to keep these arsenals under the control of their respective governments, enough have likely leaked out to cause problems in the future (think manpads vs. airliners on short final).
Peace involves stability, and Obama has fostered the opposite in the region and perhaps the world.