Curious casting decisions for this wartime propaganda piece...

Being that the film is a work of Nazi propaganda, I was surprised to see two non-Caucasian individuals among the extras. An Asian man is seen prominently among the spectators during Marcia's dance and a black man can briefly be seen in the background when the working class is first informed that the ship's engine has stopped.

While accurate, I found their inclusion in the film quite surprising because I couldn't imagine that they would be sympathetic or supportive of the Nazi cause, nor could I imagine that the Nazis themselves would look favorably upon their inclusion. I'd like to know what went on with those two individuals. Surely they must have had some sort of idea what the film was going to support. Were they individuals who would have done anything for a paycheck? Did they want to be in a film badly enough to be in one made by those who hated them? Was it a case of misguided patriotism for their German homeland? Or could it be that they were not in a position to say no? Again, if that was the case, why would the Nazis themselves want these two in the film?

I'm obviously very unfamiliar with how the Nazi Propaganda Machine worked, but I do know that their views included a fervant disdain for individuals of African descent. Was this an attempt by the Nazis to lie to other nations and say that they weren't as prejudiced as we all know that they were? It's doubtful that there will be any sort of answer which goes beyond mere speculation, but it was surprising to see them in a film like this.