Joseph,
Avram: DY’s underlying point is that Trump is the President of the United States. So even if he’s wrong and the Jew right, the Jew shouldn’t antagonise him, even unwittingly and unintentionally, since he’s the head of our government. (Or even if he were merely an influential governmental official.)
If that were his point, then his problem should have been with attendence at the press conference at all – not the question itself. Once called on (and did he really expect to be called on?), what should he have done? Refuse to speak?
Also, would you hold this same way if it were the previous president we were discussing?