I'm not so sure that is entirely accurate. Most of Israel's military superiority is based completely on air supremacy -- Dahiya doctrine. Even w/ F-35's this requires tons of US produced munitions (smart bombs etc). The Iron Dome system was jointly designed by US/Israel and most of the actual consumables are supplied by Raytheon.

I think it is accurate to say that if the US wanted to cripple Israel they pretty much could do so on a whim, using nothing more than sanctions. That also applies to any other non-superpower country of course. What I mean to say, we could sanction them like Russia etc. and it would probably have a much larger impact if we really wanted them to do what we want.