Here's the essentials...
1) gaffe won't accept that al-Qaeda destroyed the WTC, so he proposes controlled demolition at the hands of elements of the US government, up to and including Dick Cheney.
2) When it's pointed out that keeping the preparations for CD a secret is impossible, he proposes "nanothermite", remotely controlled (or something like that).
3) Even nanothermite would require tons of material to accomplish the CD - and given the amount of energy required, gaffe has to come up with something else. Nuclear weapons fit the bill, but ooooops:
4) To make up for a lack of fission products or radioactivity in the WTC debris, he proposes red-mercury-powered pure-fusion mini-nukes. Neatly gets rid of the problems with fission nukes - but creates the problem that such devices do not exist. "Red mercury" is a mythical substance.
5) Now that some lunatic has claimed that fission products are in fact in the WTC debris, gaffe throws his pure-fusion mini-nukes under the bus and is back to claiming fission weapons were used. That gets around the problem that his mini-nukes are fantasy.
But wait - his source for the claims that fission products were in the WTC debris is a *in*credible loony, who also claims that Pinatubo was engineered, as was the Tohoku earthquake, for nefarious reasons.
gaffe, you're not going to sell anyone who's sane on your nonsense. Period.