It is as often as it isn't. And it doesn't matter one bit what you think the intention was; the end result is how it's used and how it affects others. Since I brought up
Breakfast at Tiffany's and people in blackface, I guarantee you they didn't have malice in their hearts when they did those performances either. Doesn't make it any less insulting.
But it's cool, if you're trying to say that you're totally fine with blackface and offensive stereotypes, rock on. Just proves my point all the more about the British mindset.