I'm glad you called him out on it. If he's genuine he may just take it to heart, otherwise he may have already shrugged it off.

I understand where you're coming from because I once worked the nightshift with a coworker who had a really 'dark' and 'crude' sense of humor. You've got to watch out for those people, don't let em rub off on you. Stand up for your beliefs just as you did, and keep moving.