in the life savers episode when mrdrumond yelled at arnold when he went to see wills at work why was he so rough on him?

Because he was doing his job as a father.

in the life savers episode when mrdrumond yelled at arnold when he went to see wills at work why was he so rough on him?
He squirted oil on the windshield of that limousine. That must have made Phil crazy.

I don't really think he was rough on him ... but I loved how Mr. Drummond took Arnold by the collar and marched him back to the car. :D