In the last 20 years, how many Americans have gone to prison for spying for Israel versus spying for Iran?
Good thing you're not an anti-Semite, or I would have seen a deeper motive in such a deceptively-worded question.
Some better questions:
(1) How many more Jews than Iranians are there in America?
Answer: There are 20 times as many Jews in America as there are Iranians. Maybe 25 times as many if citizenship status is the determinant.
(2) Why are there 330,000 Iranians in America, anyway?
Answer: Because they are almost all refugees from the regime currently in power in Iran and they despise that regime. Therefore, the number of Iranian Americans who have any sympathy at all for the current government of Iran is effectively zero.
(3) How many more American Jews support the State of Israel than American Iranians support the Islamic Republic of Iran?
Answer: unknown, but conservatively on the order of a 100,000:1 ratio.
(4) Why did CholeraJoe pick 20 years as the time constraint for his question?
Answer: Jonathan Pollard was convicted 20 years ago, so 20 years goes back just far enough to include him in the tally.
My answer to your question is: I believe it is three Americans who have been to prison for spying for Israel - or less than one ten-thousandth of one percent of the American Jewish population, and no Iranians for spying for Iran.
But I'm sure you just happen to have the full list, so please give it to us.