Nothing wrong with that, it's Germany, if people of color don't enjoy classical music, it's their problem tbh, nothing you can do about it.
Stop getting americanized, and don't be obsessed with race.
I'm not european, and im a a person of color, but i hate the americanization of things, like being obsessed with race and stuff, it's not healthy, United States isn't a healthy country, they never were.
In related to people not wearing a mask, i think events that include very wealthy people don't require masks(i wonder why), it's the same thing in my country : actors conferences, celebrities reunions, and in every event that gathers wealthy people, you won't see them wearing a mask...but the waiters and other employees do.