No ground invasion is needed, not even serious economic sanctions for non-compliance. Just a simple phone call from American president, that Israelis are now free to fend themselves from "hostile Arabs", without US military aid (there's a precedent btw). After all, it's Israel's own responsibility to protect human rights, isn't it?
If the United States launched a land war on Israel and Palestine, Russia and China. It would be an opportunity to bog down the United States in the Middle East for another generation.
I haven't confirmed the numbers, but I saw an estimate of 75% of Israeli military funding came from foreign aid (primarily the US) and those numbers did not include the US sitting in the Mediterranean with ships intercepting rockets.
If they had to cut down their military to 25% they would collapse from outside attacks. Israel would probably figure out the funding so it wouldn't drop by that much though.
Which "hostile arabs"? Saudi Arabia and the Gulf States want military cooperation with Israel to counter Iran. Egypt, Syria, Lebanon, etc are too busy with their own affairs and have no desire to fight a unnecessarily destructive war.
