You are misrepresenting what he said. He made a joke about her teeth and his teeth. They are both gap toothed. Gapped teeth have long been considered a reason to label somebody stupid (or promiscuous as in Chaucer’s time with the Wife of Bath). He made a joke, one that he has probably told for many years, about how they both had gaps in their teeth making them both part of the master race. Yes, both the black lady and himself were part of the master race— hardly staunch nazi ideology. It’s a groaner of a joke, but there was nothing racist about that particular comment at all. Nor is there anything racist about thinking maybe MLK doesn’t deserve a holiday. People gripe about presidents day, Columbus day and turkey day every year. But the unwanted national attention, predictable death threats from morons, and a couple other dumb comments he made sealed his fate. Doubt he will miss the whatever pittance the county was going to pay him for two more months (if it’s even a paid position), and worth it to resign to keep people off his lawn (or worse yet, to keep people off his kid’s lawn who has the same name and nothing to do with this).