Russian forces appear to have opened fire on Israeli jets with advanced S-300 anti-aircraft missiles when Israel reportedly attacked targets in northwestern Syria last week, according to news reports. This could signal a significant shift in Moscow’s attitude to Israel. If confirmed, this would mark the first time such an incident has taken place.
OBSERVATION - This is serious. Israel and Russia had set up a sort of a notification system so that Israel would avoid Russian manned S300 systems when conducing their raids on Hezebollah facilities. Hezebollah had increasingly placed its facilities near Syrian ADA to gain thier coverage / support. Russia had forbidden this action. Israel in the future will not hesitate to strike Russian ADA if they target and shoot at their aircraft again, greatly raising the risk of escalating conflict with Russia.
https://freerepublic.com/focus/bloggers/4026005/posts?page=343#343
Russia want to expand conflict to save Putin face. Putin is KGB, he will try craziest stuff.