Ever work with someone who hogs all the credit? Or a parrot who never seems to have an original idea? I bet you can think of a few people who act more like zoo animals than the professionals they are supposed to be. And if you work in an environment with these types of characters, then you know that rudeness spreads like a contagion.
That is because when the boss blasts the team or dismisses effort, it sends the message that pushy, disrespectful behavior is not only acceptable — it is the only way to do business. You start to think that to get what you want, you need to assert your authority over others. Maybe even get primal. Act like a beast.
Make Things Better.