Okay, he lied. About this and a few other things. He even lied more than the typical politician.
But why does he have to say that he is a gay Jew to be elected? That is the real question here. Do New Yorkers only elect gay Jews? How is anyone else supposed to have a chance?
If he has to say that he is a gay Jew to have a chance, then we should expect gay Jew impostors. We should be happy to get a Congressman who is not really a gay Jew.