But that's the effect of having those stereotypes in our culture.
So if you come from a culture (or "pocket culture") without that particular stereotype, then the perception of racism would be absent. I'm not deliberately trying to be obtuse when I say that I honestly doesn't see the racism in this episode that others do.
It's like where the major character Cardassians are all played by White actors, I don't see that as "racist."
I watch this episode a think it's great that the planet's population, or at least it's ruling group, was cast with Black actors. Is this because I'm not White and I'm not seeing something that others do? As mentioned, I've talked with other Trek fans who are people of color and the perception of racism isn't there. Black fans point to this episode with a " it's about time" observation.
The view of racism can't be because a Black actor is portraying the episode's villain (can it?), we've seen other Trek cultures with dueling, we've seen other people maneuvering for power at the cost of others lives, we've seen kidnapping before too.
For those who see it as racist, with respect, where are you coming from that you see it?