You mean, US citizens cannot lobby the US government on behalf of Israel, or form PACs like AIPAC? And let’s suppose that they fund raise in order to put US relations with Israel above all else? Legislators get lobbied by lobbyists representing all sorts of interests, both foreign and domestic, and hopefully they have the integrity and judgment to balance those lobbyists’ promises, threats and arguments against the interests of their respective districts, states and the country at large. If they do not, the fault is with the legislator, not the lobbyist, who is merely doing his job. Same thing occurs in Israel, and the same answer applies to our legislators. It’s how the world works.
The guy is a loud mouthed hypocrite and the US isn't doing anything that hasn't been par for the course for fifty years just like they do.