Just because the hit was to the head doesn't make it automatically illegal, Campoli had his part too. He lost control, ducked forward and what we can only assume a full body check became a head hit. They don't have to like it to find it legal. Campoli's loss of the puck made it legal, but with everything there are two sides and Malone got a warning too.
Not sure what your problem is to be honest. No offense intended. :).