Realistically, there is nothing the West can do about Syria in the short term, while Assaad has the 100% backing of Russia! Even if this were possible, what about IS? Do we invite them round to the UN a la Owen Smith and have a little chat with them to persuade them that their behaviour isn't very nice and could they please stop it? We're dealing with people who are monsters, on a par with Nazi Germany, and look what it took to overcome them?!! There is so much suffering in the world caused by vicious regimes, we can't oust them all, and put in place modern benign democracy's! How?!!! Sending in troops? Africa has its own peacekeepers who do their best, but are, if we're honest, pretty ineffective.
Economic sanctions against Russia?! We've tried that over Crimea and it blatantly doesn't work. Putin doesn't care about human suffering, his countrymen blame the west for any economic woes, well they would wouldn't they?!!!! Putin knows we're weak and quarrelsome, he got away with Crimea, and he'll get away with this because, bottom line, we including the Americans fear him.