May he rest in peace. I thought some of what he did was very funny but personally, I never liked his routine of insulting audience members. It bordered on cruel sometimes and the target was stuck there with everyone looking at them and unable to fight back.
You’d have enjoyed the time a guy I knew who had a booming voice and an extremely quick wit, went to Vegas, took in a Rickles show, got picked on and gave Rickles as good as he got. Later, in the casino, people congratulated this guy on what they assumed was a scripted show. My friend didn’t throw Rickles but Rickles didn’t throw my friend.
After sitting in the front row of comedy acts i learned my lesson and sat further back.