Israel is trying to control what happens to the weapons . Assad is no ones friend and he is a terrorist to boot but he is dug and has MUCH to lose . Now the other side is not dug and doesn't have much to lose . If you have a lot to lose you are easier to control with a threat , Assad knows if Israel wants to kill him they can at any minute and because of that he doesn't make a habit of sending his hordes across the border into Israel . Someone who hasn't got millions to watch over and all Assad's comforts don't have much to lose and are much more apt to send their henchmen across the border into Israel.
It was the same with Egypt and Mubarak (he had lots to lose) and Gaddafi too .
Rich dictators set in their comforts think twice about starting things themselves ... they don't want to find themselves hiding in holes.
I swear I hate this keyboard that if I don’t put tons of pressure on the keys I miss tons of letters