The percentage of the U.S. population is irrelevant, because most Americans are not in a position to be an atomic spy. Given that the two most notable atomic scientists - Einstein and Oppenheimer - were also Jews, it is predictable that there were more Jewish atomic spies than African-American atomic spies, for example.
Communism is the bastard son of Judaism so I would still expect communist spies to be more likely to be Jews, but Jews being more likely to possess the access to become spies is an important mitigating factor for your statistic.
The dominance of the nuclear program by jews raises its own host of questions - though as you point out it likely mitigates to some degree the utter absurdity of the titular statistical discrepancy. To a significant enough degree that it invalidates the thrust of the post? - don’t see anything close
The percentage of the U.S. population is irrelevant, because most Americans are not in a position to be an atomic spy. Given that the two most notable atomic scientists - Einstein and Oppenheimer - were also Jews, it is predictable that there were more Jewish atomic spies than African-American atomic spies, for example.
Communism is the bastard son of Judaism so I would still expect communist spies to be more likely to be Jews, but Jews being more likely to possess the access to become spies is an important mitigating factor for your statistic.
The dominance of the nuclear program by jews raises its own host of questions - though as you point out it likely mitigates to some degree the utter absurdity of the titular statistical discrepancy. To a significant enough degree that it invalidates the thrust of the post? - don’t see anything close