Bourdain had personal experience with Cambodia and saw exactly what Kissinger wrought and the effects that were still plaguing the country decades later.
It says Bourdain was one of Kissinger's fiercest critics. I haven't seen any articles about how much Christopher Hitchens criticized Kissinger. He even wrote a book about it.
In the words of Hitchens, Kissinger deserves prosecution "for war crimes, for crimes against humanity, and for offenses against common or customary or international law, including conspiracy to commit murder, kidnap, and torture." He further calls him "a stupendous liar with a remarkable memory."
And if I recall correctly, Hitchens at one point was asked whether there was a person he genuinely disliked, and from the way he spoke about him, it seems like he probably actually hated Henry Kissinger.