I believe it's a mistake for us to get to [directly] involved there.
Syria is a hornet's nest of muslims warring against each other. Let them have at it, as far as I'm concerned. I don't care WHAT they do to each other.
I would much rather see Israel take the initiative here. After all, Syria is "in their neighborhood", and has always been a hostile neighbor at that.
Particularly where "gas" has been used, the Israelis have a "higher moral ground" from which to attack -- having been once gassed, themselves, in their history. Let other nations of The West try to speak out against that.
Of course, we should provide covert help where needed.
But again, I believe the Israelis can -- and will -- "do a better job" of sorts than we could...