Earlier quoted context omitted.
What is threatening about that joke?
That's exactly it. We find it so hard to understand how that joke is threatening. It's almost impossible to imagine. It just sounds like a dumb joke. But look at how Adria describes her feelings in the article: “Have you ever had an altercation at school and you could feel the hairs rise up on your back?” she asked me. “You felt fear?” I asked. “Danger,” she said. “Clearly my body was telling me, ‘You are unsafe.’” I…
I'm asking if you acknowledge the existence of some norm in our society for the reasonableness of being offended. Is there a point beyond which we as a society say, "No reasonable person would ever be offended by that, so we're sorry you're experiencing negative emotions and rising hair on your neck, and we're sorry you feel like murder is imminent, but this is not actually a problem and there is a negligible probability of you being killed based on a joke about the king's sleeves."
Note that a consequence of denying such a norm is that we must frequently reorganize our society to please myriad extremists of many stripes, many of whom have mutually exclusive demands.
Conversely, if you admit the existence of such a norm, is this controversy just a discussion about how to construct an algorithm for calibrating it? I'm genuinely asking these things, not being snarky.