So let me get this straight, you want Western Troops in Syria to be a police force. You do realize a good majority of foreign insurgents in Iraq came from Syria and a majority of the Middle East has a pretty low opinion of the West. If you want to send the police force, let the Arab League do it. I personally wouldn't want to go, especially in a blue helmet where rules of engagement prevent me from protecting my buddy.
I'm sorry, but most of Western Troops are burnt out from a long conflict in Afghanistan and Iraq, and in the current credit crunch, no one has the monetary funding to actually do something about it other than sanctions. Forget about China and Russia, they are interventionist, and only intervene when it threatens their profits.