He didn't say anything, not to me anyway. Certainly I wasn't helped in my quest to learn which demographic groups to watch out for. Also, I find this coyness passive-aggressive and just generally cowardly. If you believe in something, say it -- with civility and respect, of course.
He failed to specify a particular group out of respect for the forum rules. At least for the U.S., eliminating sports/band riots should narrow the list down considerably.