Upon a hasty skim, I noticed that Mr Hirschhorn's post appears to consist of political diatribe, rather than any reasoned calculation. As noted above, paragraphs 5 & 6 are absolute Komedy gold. Paragraph 5's first sentence
("Technically sound analyses of what happened at the World Trade Center have unequivocally shown that the official 9/11 story is not credible (www.ae911truth.org)") has only 23 words, and yet manages to be more inaccurate in a shorter span than almost anything else I have read. The first 7 words of the next paragraph helped me to realise that Mr Hirschhorn must have forgotten to take his meds.
If this is the best the Twoofers have, then they are truly QED*.
* Quite Evidently, Dead.