I do not see any joking.
Mary Jo and her family weren't laughing either. He left the scene of the accident and didn't return to the accident scene until the next day/or morning. The accident happened at night.
He did a lot for the political scene but he was paid for that. He assisted his extended families but that is something that extended families do every day.
He would have been in jail had his name been anything other than Kennedy. He was just a man and for that reason alone RIP.