Mr. Graham writes an essay supporting free speech. Thus the comments here, ironically, attack his speech, with tons of words found no where in his essay at all. The comments here literally prove the spirit of his essay.
Freedom of speech is the freedom to disagree, including on completely irrational grounds (from someone's perspective). You seem to hold a common misconception about what it means to criticize someone.
I don't see the irony. I don't think anyone is denying PG's his right to speak freely, they're just disagreeing with him.