Im not convinced Obama will come full bore. I believe, he will only come full bore if the public demands it and Im not sure they have an appetite for it right now after more than a decade in Iraq and Afghanistan. He certainly didnt come close to coming full bore when our own diplomats and citizens were calling for help in Benghazi.
We(the USA) were not involved when Israel went into Lebanon in response to the rockets from Hezbullah. We were not involved when the rockets came from Gaza and Israel invaded Gaza the last time. Of course Israel had the upper hand and didnt need our help and they were only fighting on one front at a time in those instances. But my point is their enemies are stronger now and things could develop very fast and I think we would eventually step in if Israel appeared severely threatened but by that time , quite a bit of damage could already be inflicted on Israel. This wont be like the six day war of the past. These countries didnt have rockets then capable of striking anywhere in Israel. Obama doesnt rush full bore into anything. Thats not his style. I dont see any USA participation until and unless Israel had already become severely damaged.