Louis CK and all other people defending the use of rape jokes are complete and utter shits.
No excuse.
'Oh, it's a free country blah blah blah'
A) Don't use laws from the US to cover for the fact that you're a talent-less hack who's method of 'comedy' is to be a bully, and
B) FUCK YOU.
And way to go, Jon, letting him act like a complete asshole and doing nothing about it.
There's nothing funny about rape or the rape culture that excuses it. And it's not about 'not having a sense of humor'; it's about having a sense of decency you piece of shit.