Meh, have some faith in the reader. Nothing you read will apply to your life/business 100%. You have to be smart enough to know what's relevant and what's not. Also, authors often use strong language, because no one wants to read a flaccid diatribe. If you're worked up about it, the author got what he wanted.
I can't answer that for you, because it's all relative to your goals. Maybe nothing at all.
This is why some people are effective, and others are not. Some people get hung up on whether someone else is right or wrong, while others take what's useful and move on.
