I believe Magnus is a HS football coach (or something along those lines). He has always voiced his opinions very strongly (sometimes a little too strongly for my liking), and kinda comes off as a d*ck if you disagree with him. That said, take solice in the fact that Hoke and Mattison have a hell of a lot more experience evaluating players, and get payed a hell of a lot more money to do so. They also have access to hours of film on these prospects, where people like Magnus make scouting reports based off of a 5 min highlight film or some limited game action (I've always laughed at this point).
“He was on the other side of the court, screaming: ‘Good shot, Kev!’” Durant said, shaking his head in delight. “I’m thinking, this guy’s an All-American type of teammate right there.”