There is more legitimacy to intervention in Syria having seen the weapons unleashed on Syrians by Syrians. That deadly chemical attack specifically has been ascertained by Russia, Iran, Israel, US, UK and France.
Issue just left is the intervention via the UN, NATO or Anglo-American powers given the Russians have blocked all resolution attempts so far Wed 28/08/2013?
All the same, it's about to rain Tomahawks likely by weekend.