I was told this story by a Bethel 'heavy' who swore it was true.
It is of Lyman Swingle (was a Governing Body member, now dead) at the dinner table in Brooklyn Bethel: a new black lad was at his table and Swingle asked him, "Pass the salt, boy."
He lad took this as a racial slur and said, "Pardon me, Brother Swingle?"
"Pass the salt, nigger," Swingle replied.