The poster is clearly an ass.
However, I hate censorship more than I hate stupid, hateful people.
In fact, sensors often are small, hateful people.
I support you in being offended by the jerk. I'd recommend a thoughtful, reasoned refutation of his idiocy.
But I do not want to live in a society where sticking one's foot in one's mouth and acting like a jackass is a criminal offense. In such as society, everyone would be uptight and most would be criminals.
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"Alas, our dried voices when we whisper together are quiet and meaningless, as wind in dry grass, or rats' feet over broken glass in our dry cellar." --TS Eliot, "The Hollow Men"