From the article:
Since the fall of 2015, Moscow has supported Syrian leader Bashar Al-Assad, while Israelis are bombing pro-Iranian forces that are fighting on his side. Even in this tense situation, countries adhered to their long-standing partnerships. After the attacks of the United States, France and the United Kingdom on Syria, Moscow announced that it intends to deliver modern C-300 air defense systems to Syria. Until now, Russia, at the request of Israel, refused such supplies. Russian media quoted clear words from Moscow: if Israel attacks the new systems, it will have "disastrous consequences." Israeli Defense Minister Avigdor Lieberman replied: “If someone shoots our planes, we will respond. Israel will even attack Russian weapons systems in Syria if they use against Israel. "
This, according to the German media, could lead Russia and Israel to a collision.
What happens if the Russian air defense missile systems will actually be in Syria? Militarily C-300 no problem for the Israeli Air Force. Israel is armed with the latest F-35 aircraft, which C-300 is not a hindrance. But at the same time to suffer - and for a long time - good relations between Moscow and Jerusalem can.