Want to shock the average person who considers himself an 'intellectual' or 'politically enlightened?' Say something inegalitarian (whether it's true or not doesn't really matter in terms of the emotional impact it will cause) about a population group other than southern whites.
Other fun hot topics include eugenics/dysgenics and the cultural attitudes and government policies that drive population quality, the concept of population quality itself, immigration and whether it should be restricted, whether the 2-parent family unit is important to society's long-run health and how feminism played a role in its decline, etc.