I don't see how "his protest emotionally upset me" is a valid argument for restricting free speech. I'm no Constitutional scholar, but beyond civil harassment, "fire in a crowded theater", and encouragements of violence, I don't see a compelling reason to restrict it.
This, I don't think, fell into any of the three. It worries me.
It's not a matter of it just making him sad. The accusation of
intentional infliction of emotional distress carries with it very specific things that the plaintiff must show:
1. The defendant must act intentionally or recklessly;
2. The defendant's conduct must be extreme and outrageous; and
3. The conduct must be the cause of severe emotional distress.
Further down it also says that "the defendant's conduct must be more than malicious and intentional; and
liability does not extend to mere insults, indignities, threats, annoyances, or petty oppressions."
In other words, it's not just being a jerk to someone; you have to do something really, really bad to intentionally cause extreme emotional trauma to the victim for this accusation to fly. As I said before, courts are generally
not receptive towards claims of IIED; for a court to actually award damages to someone based solely on this charge, you have to seriously go beyond the pale.
Personally, I look at emotional damage to be roughly the same as physical damage. If you punch someone once, that person probably isn't going to win a court case over it. If you pummel someone into a bloody pulp, the chances probably go up substantially. Same thing as with a person's emotions. A person should be liable to take a little emotional beating, but just as certain amounts of physical assault are deemed to go too far, so too are certain amounts of emotional assault.
I see nothing wrong with protecting people here just as they're protected against physical assault. Just as Mr. Universe might be able to take an abnormal amount of physical damage and come out on top, so too could an abnormally emotionally strong person be able to take a large emotional beating, but everyone has their limits, and I don't see why we can't acknowledge an emotional limit the same as we acknowledge a physical limit.