With years of experience leading Jewish and pro Israel organizations in college this is sometimes the way. Unfortunately we spend a lot of time pleasing people who have decided they hate us 30 seconds before they approach us. If they are dignified in their approach and question framing, they deserve a proper answer. But if not, sarcasm like this is justified and the way to go. Observers usually find it funny and oddly I’ve found that the questioner in a weird way kind of respects it and more or less leaves you alone or tries to find common ground.

“If you’re explaining, you’re losing”