Joan Rivers was a bitter, bitter woman at the end.
Joan Rivers' humor revolved around saying outrageous things about famous people. I saw a film clip of another street interview about the same time, and it was clear Rivers was joking. This video didn't emphasize it, but it did mention that Rivers was coming back from having officiated at a gay wedding. And Rivers had spoken out on behalf of gay rights for years.
Do you think that someone like that would say that about Obama and Michelle and not mean it as a joke?