I agree with your sentiment in general, but it should be pointed out that Russia invaded Georgia in response to Georgia's invasion of South Ossetia (direct parallels can be drawn to the UN coalition attacking Iraq over it's invasion of Kuwait), the airliner was shot down by Ukraine pro-Russian rebels (who while no doubt in league with Russia almost certainly did it by accident) and lastly while the Syrian regime is quite reprehensibly it's still the least reprehensible group vying for control of Syria.
Russia shot it down.