He was Jewish. He suffered and fled Nazi persecution. He was highly intelligent; he surely gave that question some thought. He most likely felt, especially as a Jew it would be a major mistake to voice it. NO one wanted to go there.

Wikipedia: "He had a negative view of American Jews who lobbied for aid to Soviet Jews, calling them "bastards" and "self-serving".[126] He went on to state that "If it were not for the accident of my birth, I would be antisemitic" and "any people who has been persecuted for two thousand years must be doing something wrong."[127]"

Holy smokes......a tad self hating?