Let's be real. Most people don't care what happens outside of their personal space. Especially those making money of of other people paying to watching them do stuff. Can't expect everyone to know and/or understand.
Then don't expect others to give them the benefit of the doubt or twist themselves in knots trying to excuse their racism.
If you're on the internet, if you're on forums, if you are a streamer that's exposed to a worldwide audience then ignorance is a very weak excuse. And if people really cared they wouldn't be putting all their energy into defending ignorance and coming up with excuses. Not when they could sit back, listen and educate themselves instead.