Basically.
Speaking as a young black man (that wears his pants at his waist) we are targeted enough by police because of how we like to dress (i like big baggy pants, they are simply comfortable, but use a belt!) And I don't see why you ran, I highly doubt he was unqualified to own that gun if he was openly carrying it.
He just didn't know enough about holsters. Should have just given him a good word on secure holsters for safety reasons and made a positive experience out of it.
After that, THEN you mention why you should pull your pants up and look more presentable while carrying.
I do it all the time, sadly guns are sFeen as evil in most black communities, but I educate many about the truths of guns and carry.
*swyped from the evo so excuse any typos*