The whole post is silly. You say you don't get angry but then you recognize situations that make you angry and say "Look, I didn't get angry!" But in fact, you DID get angry you just chose to react to it in a different way. What you're saying is not "Don't get angry." You're essentially telling people not to dwell on their anger but to move on. That's fine, but it's hardly revolutionary. You might as well just refer people to the book, "Don't Sweat The Small Stuff, And It's All Small Stuff." But the truth is that philosophy was already hackneyed when that book was written.
There is nothing ineherently bad about anger or jealousy. They can be great motivators.