The actual cowboys of the "open range " period, 1865-1895, were 25% Black, 25% White, and 50% Mexican. They were migrant laborers, not American heroes. Sorry, "Gunsmoke" is not a documentary.
I watched it happen and that scene looks very like a clip from another movie. Was wondering what the hell was going on. Not only does it look shit it's proper disrespectful to actual history.