From what I understand, he was trying to get even with his coaches for the way they've handled him.
You play for your team and players that are battling to help defend you in net, you don't pull a stunt like this and screw your team.
If my goalie ever did something like this, I'd whoop his ass... I don't care if it's recreational league, high school, juniors.
Not a cool thing. The salute was funny, but this kid is an embarrassment.