When people call for a national "conversation" about race, what they really have in mind is a lecture. Sometimes President Obama is among them. Of course local cops saw no racial motive in the Trayvon Martin killing, but hold that thought.There's also the case of Delbert "Shorty" Belton, an 88-year-old World War II veteran mugged in Spokane by two black teenagers who stole his wallet and beat him to death.