I think Cleary should fined very heavily for this. You just have to do everything you can to set an example from the top down that childish bullshit from coaches/players wont be tolerates against officials.
What ever you think of Klein, he deserves to be able to go and do his job without fear of some irrate coach having a toddler temper tantrum getting aggressive about the calls.
And hot tip, Klein didnt even have a bad game! The panthers were totally and completely out of line going on about the calls.
The Whare sin bin was as clear as day, a clear professional foul. Klein and the officials got it right.
The Croker incident was a collision, no one changed their line to attack the chaser, both players made a direct line for the ball and contact occured. Klein and the officials got it right.
The CNK try, Mansour has a single arm drapped around him, gets a clean look at the footy. Spills it, gets another look at it, spills it again. Naden gets a crack at it, and he's content with conceding the goal line drop out, but instead of just grounding the ball, he derps it up and tries to knock it dead, no downward pressure and it bites him.
And if you've got a problem with Mansour being tackled in air, fine but 2-3 sets later, the Panthers lay a much bigger hit on our guy Simmonsen in the air, and guess what? It wasnt a penalty either. So whether you think that is a penalty or not, the officials were consistent with thier calls. Which even if you think it's the wrong call, it's at least fair that it's called the same both way.
Simmonsen made the catch and Mansour didnt. That's on the panthers, not Klein
And as for the raiders lying all over them in the ruck.
https://www.nrl.com/draw/nrl-premiership/2019/round-19/panthers-v-raiders/
Raiders average PTB speed was 3.77 seconds v 3.33 seconds for the panthers. So in a game where the Raiders forwards dominated up front most of the game, and some how had slower play the balls, this guy wants to get aggressive with an official about the ruck?
Bullshit. That's a disgusting example to set down. Focus on your own shortcomings, of which there were plenty, including your own son lacking any ability to make more than a single play with 50 tackles inside the 20.