Exactly. What you keep dodging,
@Discofan is that the scenario you're imagining is entirely contrived. If you are trying to cast an Indian guy, and you have one terrible Indian actor and one decent white actor in blackface, guess what the solution is? Find a third guy!
You're engaging in the acting corollary of what we had in the First Asian Captain thread, "I don't see colour". "Just choose actors by merit, they're
actors" sounds lovely but is a hugely problematic position when filtered through the real world of prejudice and discrimination.