Sadly, there will always be those that feel the rules or regulations do not pertain to them. Perhaps the reason they continue to think this way is that no one has challenged their attitude with consequence.
Maybe if someone chose to steal money from you on the beach or would damage your car and drive away you would be less understanding of their wrong doing.

Most of us know the difference between right and wrong. Maybe this jerk needed this level of response to get the message after more peaceful means failed but I doubt that he would have been receptive to your "convincing counseling".

Hope your vacation is enjoyable on our favorite island, safe and without any unpleasant incident.