I’m with you on this one ... gut feeling. Unless we are in the ME to help protect Israel, we should just keep our noses out of there (and bring our troops home).
Well, how much does Israel want the Syrian depots, full of Sarin and other poisons, to be vaporized by US bombs? The winds will then spread the clouds of poison all over the area... and into Israel.
There is no telling where Assad keeps the CWs, and there is no telling what targets the US generals will pick. Some Syrian commanders may even intentionally preposition a few barrels at vulnerable spots of potential targets, so that when they are bombed and people die the USA can be dragged to the International Criminal Court for a war crime. (Think it can't happen?) It would be insane, from Israel's point of view, to allow the USA to mess with Israel's backyard when consequences may be catastrophic.
Removal of Syrian CWs is a definitely positive development, regardless of anything else. The CWs must be disclosed, inspected, guarded, and then preparations for destruction can start (IMO it will require building a local facility for destruction of CWs. It's hard to imagine carrying them for thousands of miles to the USA or Russia, where specialized facilities already exist.)