[throwaway27448]

I agree that Chomsky's assessment hasn't made sense for a while. Maybe it did until, I don't know, the camp david accords, but at some point the Lobby became too integral to even clearly acknowledge. Perhaps Citizens United helped metastasize the problem. It's also simply a dogmatic, cultural reflex at this point: to not support Israel is politically unthinkable on the hill. It was political suicide for so long the older politicians especially are incapable of even milquetoast critique.

It's also worth noting that the public is so aware of AIPAC that it's become a bit of a too-visible stink. More and more pro-israel money is being funneled through other mechanisms: Democratic Majority for Israel (DMFI), NORPAC, United Democracy Project (UDP), Pro-Israel America. There are also regional pacs, like To Protect Our Heritage PAC in Illinois, SunPAC in Florida, etc.