You have to understand that the Linux Foundation is using his "rage" as a PR exercise. He was outspoken from the start, even as a kid. His reply to Tanenbaum when he first released the Linux kernel is well know. But the Linux foundation realised that they can capitalise on this "rage" by making it more visible. Any publicity is good publicity, as they say in PR world. Negative news makes more impact than positive news. How many people outside the BSD community know who the lead developers are for BSD OSes? How many of them are interviewed at TED talks[0]? It is all about publicity.

[0] https://www.ted.com/talks/linus_torvalds_the_mind_behind_lin...