Assad did not actually say Syria would do it, what he really said was more along the lines of 'there are many players who will have various reactions, they're unpredictable and anything could happen.'
Of course the fat Obama-blowjobbing Lib on The Five, whose name eludes me at the moment, and several other retards and NeoCons on the news shows today, proceeded to denounce it as a direct threat against the US by Assad, which was actually bullshit. Even if he had said they would directly counterattack, which he didn't, since when is it a threat to tell someone who is threatening to attack you with missiles that you will have to fight back if they do?