AIPAC Should Register as a Foreign Agent

This blog makes a good argument that AIPAC should register as a foreign agent. I suppose that American Jews believe that Israel's interests and America's interests are identical, and therefore AIPAC is not working for a "foreign" state. But not everyone accepts the hypothesis that Israel is a 51st state. If AIPAC did what it does for Russia or Iran, for example, rather than Israel, there would be a huge outcry about what it does. Maybe the Iranians will start their own AIPAC, but their "I" will stand for Iran. I presume the US government would give it even-handed, "fair and balanced" treatment vis-a-vis the Israeli AIPAC, let it do the same things.