Hey, this is open-source. People join and quit projects all the time. They do it for any number of reasons. In this case, is the departure over the attitude as stated in the article or is it over the direction (Linus not wanting to include a BSD-style secure level interface)? Both are acceptable reasons. Why? Because the contributors are volunteers and can leave for any reason they want.
There isn't a story here. People already know that people join and quit OS projects all the time, so this departure isn't news. People already know that LInus can be brutally honest in his comments to others, so the reason for the departure isn't news either. Even a fork of the kernel isn't news because there are a number of them.
So, unless I'm missing something, there is no news here and we should all just move on.