That would have been the perfect comeback.
I consider it perfect logic. However, the MSM backs the left and they would have start writing, “Breitbart successor compares Obama professor to Nazis!” And then the Jewish guy who always comes out about such things would have started moaning about how the sacredness of the holocaust was impugned.
The liberal playbook is that logical argument can always be undermined by playing the race card. And they can get away with it because they control the media.