Dennis writes: "But black sporting events and white sporting events, black restrooms and white restrooms, black schools and white schools, or black clothing stores and white clothing stores would be considered immoral. "
But 75 to 100 years ago, such things would not have been viewed as immoral by a large percentage. It's called progress. Like many, Prager seems to support the progress that got us where we are today, but doesn't want to see it continue into the future. (Progress in past good; progress in present or future bad....)