The amount of money the Israel Lobby is able to muster for an effort like this is staggering.
It bears mentioning that the American aerospace industry is massively intertwined with Israel's and that they both have a shared interest in getting Congress to cough up money for defense contractors.
http://www.theoccidentalobserver.net/2013/09/the-organized-jewish-community-wall-to-wall-support-for-a-strike-on-syria/