Every tape I have seen of this starts with "Shut up!" My experience has been that if you bait a stand-up comedian or talk loudly enough to disrupt his routine, you will be brutally insulted from the stage. I have to wonder what the heckles were that sparked the tirade.
Whatever happened, Richards was back on stage the following night to a sell-out audience. The club didn't feel the need to apologize beyond the feeble "Sorry about that" on Friday night after Richards walked off stage.
I don't know. I would have to know what triggered the response before I passed judgment. If the audience was making racist remarks, maybe the reponse was appropriate FOR A COMEDY CLUB BUT NOT FOR THE GENERAL TV AUDIENCE.
Foul mouthed racist misogynist filth is pretty standard in these venues.