No, Yonatan Zunger is the one who should be embarassed. He lies in his very first paragraph, setting up a straw man which is consistently relied upon throughout the piece.

The original manifesto is thoughtful, articulate, thorough, and sincere. It provides a basis for dialog, discussion, and disagreement. Zunger's article is mostly a pile of fallacious rhetoric that by chance raises a few interesting ideas that could be twisted into a legitimate counter-argument to a couple of the manifesto's points if you tried really hard.