Your example of Syria and Russia there is completely wrong.
First, Israel, during the years, has shown to be as heavy handed, if not more, compared to what's happening in Syria at the moment.
Second, people ARE questioning israel's actions, AND the us for fully supporting em, I don't understand what you are saying there when you say "angry with Syria not with Russia".
And finally, things are COMPLETELY different. Russia isn't advocating what Assad is doing. Russia is preventing a UN action (they could Be right seeing how things developed in Libya).
You CANNOT compare the relationship between USA and Israel with Russia and Syria.