If I laugh at a rape joke, that does not mean I condone the practice, it simply means I find the joke funny. For example, spyman's joke with the nuns was funny.
We also often use other strong words in our vocabulary. Just search the forum, look how many times we say: "After what Italy pulled on me, I was totally going to kill him", or "He's going suicidal against Turkey, and rightly so" or something similar. That doesn't mean we condone murder, or we encourage suicide.
The text is nice, but it's using a common rhetorical fallacy:
"You. The rapist's comrade.
And if that doesn’t make you feel sick to your stomach, if that doesn’t make you want to throw up, if that doesn’t disturb you or bother you or make you feel like maybe you should at least consider not participating in that kind of humor anymore, not abiding it in your presence, not greeting it with silence…
Well, maybe you aren’t as opposed to rapists as you claim."
Sorry, but I am not feeling sick to my stomach. My stomach is doing just fine. No intention of throwing up here. I would be disturbed if the number quoted there were true, but I have a hard time believing it. So you conclude that I'm not really opposed to rapists in general.
My point is that being a rapist is different from condonig rape, which is different from joking about it, which is different from contributing to a culture where rape jokes are tolerated, which is still different from allowing other people to suspect that you are maybe not opposed to living in a society where teenager joke about rape. The latter you can accuse me of. If you accuse me of the former, it's downright slander.
The writer this text has great rhetorical skills, but her point fails to hold. I am not responsible if other people (the rapists of this world) happen to believe I am their friend.