Ditto. No need or excuse for that, and someone with that much experience should already know better.

He's probably a career CFI because he knows he could not get away with that behavior in most other professional flying jobs...and he gets his kicks by berating people.

There are a VERY few occasions where you might need to raise your voice for emphasis. Basically only when you are trying to break the student of a potentially fatal bad habit, after other methods fail (like the guy who always gets slow on final, or tends to overshoot and cross-control )