Someone wrote and asked me, "Why are there Israeli- but not Mexican-American Dual Nationals?"
Unless we are Native American Indians, all Americans have their origins in some other country. Both of my parents were from England. They were proud to be "British" but they were most proud of achieving their American citizenship.
When they took their oath to become American citizens, my parents had to pledge their "allegiance" exclusively to America and renounce their allegiance to "any and all foreign governments."
Since citizenship carries with it a responsibility to be exclusively loyal to one country, the whole concept of dual citizenship and nationality raises questions about which of the dual citizenships have priority.
Policies in the name of Israel are more often than not carried out by US government appointees who hold powerful positions and who are dual American-Israeli citizens.
Since the policies they support are often exclusively beneficial to Israel, often to the detriment of America, it has been argued that their loyalties are misdirected.
A few classic examples can be cited here.
Jonathan Jay Pollard [right] was an American-Israeli citizen who worked for the US government.
He is well known because he stole more secrets from the U.S. than has any other spy in American history. During his interrogation Pollard said he felt compelled to put the "interests of my state" ahead of his own.
Although as a U.S. Navy counter-intelligence specialist he had a top-secret security clearance, by "my state" he meant the state of Israel.
Literally tens of thousands of Americans holding U.S. passports admit they feel a primary allegiance to the state of Israel.