Thanks for posting this.
My guess: the game changed when Assad loaded Hezbollah trucks with the chemical warheads and sent them to Lebanon. Probably enough to take out Haifa.
Israel has no interest in intervening in the civil war in Syria. Our policies and our positions are very clear and are based on three red lines: We will not allow any harm to come to Israeli citizens; we will not allow any harm to the sovereignty of the State of Israel; and we will not allow the smuggling of sophisticated weapons or chemical weapons from Syria to Lebanon for Hezbollah, he said at Knessets Foreign Affairs and Defense Committee.