His joke WAS on the edge, I will admit, but again, this was a comedy club. He also warned the audience as he always does. If you would have listened to the set up, reaction and the punch line, you would find the editorial was overblown, though the joke is on the edge.
The joke about the victim marrying her rapist is a true story which can be found on the internet. Chris' joke was not to make light of rape, it was to point out the hypocrisy of thier nuptuals.
Just like the intent of the use of the "R" and "A" words in the Hillary joke was not to condone either, but to point out the suspected coldness of Hillary's heart as joked about by many.