An email about costumes and culture vs. hundreds of 4channers threatening physical violence and assault are entirely different things. An idea, which is free speech, and harassment, which is what you are suggesting, are entirely different things.
I can certainly agree with that, but the nuance that some words might have an impact while others won't (or shouldn't) was lost in your original statement that "If you are so weak that words hurt you, that the mere speaking of words makes you damaged, I am afraid that you need psychological help." It depends on the words.