Correctamundo.
Imagine a black candidate being asked if it was true that he was his grandmother was an octaroon.
It is race baiting at its worst.
Actually, it was more like if a white candidate was asked if his grandmother was an octaroon, and then asked when did his family start passing for white- passing seen as a self-hating, cowardly act. Allen was not angry at being called Jewish, he was angry that his mother's choice to conceal her full ethnic heritage would be brought to light and that her name would be dragged through the mud.
I don't know why Allen's mother hid her Jewish ethnicity from her own children, but it is (or should be) irrelevant to her son's campaign. The question was unprofessional and disgusting, IMO.