The only downside, for Obama, is that his Saudi masters are pissed at him for not unilaterally bombing the hell out of Assad. As far us real Americans, the Russians helping kill fanatic Muslims is all good. We need to send Putin letters of appreciation.
Meanwhile we need to convert existing vehicles to natural gas and build new ones to run on it, ramp up natural gas production, and also export it to Europe. The collapse of world oil prices when we sharply cut back on our 9 to 12 million a day imported oil habit would, as a side effect, cut Putin’s nuts off. No revamped military for him.