That hasn't been my experience. After I settled in here people eventually approached me and said they were afraid to talk to me about anything not work-related out of fear that I'd take something the wrong way.
I think men are less concerned about their ability to tell rape jokes and more concerned that anything can be blown out of proportion and taken to social media. This sort of stuff can ruin lives and I think THAT is why many men walk on eggshells. In this case, people went after pg without even hearing his side of things, and a quick browse of Twitter leads me to believe that even though he's stated his side of things people are still unwilling to change their stance on this. Instead, they'd rather be pissed off and label him as part of the problem.
In some cases what you said is probably true, but based on what I've seen they seem to be a minority. I don't think your average person honestly thinks that rape is okay, even if they find humor in rape jokes.