At the local food court, its usually Mexicans working at the Chinese restaurant and blacks working at the Mexican restaurant. I can’t explain it.
Chinese restaurants that are owned by Chinese pay very poorly, and if they cannot find enough family to work they hire Mexicans.
I’ll just call it financially cautious on their part. (My wife is Chinese...)
Let me 'splain it for you... Mexican food is harder to screw up, while getting Chinese cuisine just right is demanding. Cooks are hired accordingly.