If the Syrian rebels weren't after Assad they would be after the Jews. I think Assad knows if he used the chemical weapons against Israel, his country would be decimated, 1 million times worse than the rebels are doing to his country.
But you never know, with Netenyahu. He's a crappy leader, and a worthless leader. He always appeases the left and the Israeli Supreme Court
(in order to keep his seat) no matter how many Jews are killed as a result. Year after year, the Arabs fire off thousands of rockets from Gaza, murder Jews in the streets of Israel, and he still wants to give the Arabs a state.
http://www.debka.com/newsupdatepopup/1745/