sillywindows
People have cultures and personalities, many which are not understood by other cultures and personalities. I prefer us to exist side by side instead of banning one in favour of the other.
These days race has mostly been reduced to vague groups of appearance; for medical/genetic groups we usually have better indicators. It is still useful as a vague appearance descriptor. We shouldn't claim that a visual description is racism, it is just a handy tool.
There are plenty of people who happily interact like this daily. It is a personality. People talk and act in different ways, they are different people, I think it is reasonable for them to continue acting like themselves.
I don't find the way Linus writes offensive in the slightest. To me it is mildly amusing while making a point. I don't want to have all communications in a forced polite cotton wool tone, it becomes robotic. Further encourages people to act over-sensitive, making it harder to communicate.