This has nothing to do with political correctness; this has to do with being polite and professional. A useful attitude when dealing with other people, and that goes double when you are a public figure whose word carries a lot of weight. You and he may think being abusive is fine and gets results, well, more power to you. But it also means people will simply start avoiding you and your projects.
6 years ago I set myself a goal that I have reached since: to never work for any asshole again, and to set myself up so that I can comfortably walk away from any job. Now I know I can walk away, and it makes a world of difference in the way I approach my work. My managers also know it, and it makes a difference there too, and in my view I enjoy an altogether healthier working relationship with them. The world needs Linus more than it needs most of us, but that doesn't mean any of us have to stand there and take his abuse while kowtowing to him. The guy needs a good dose of humility.