He appears to be both unable and unwilling to process any form of reasoned argument even when it is spoon fed to him in simple language. Plus he lacks even basic courtesy - he asked me some questions and I presented him with a professional standard explanation and answers in
this post. He has not even acknowledged my effort
in response to his request - let alone said "thank you".

I was well aware of the risks, enjoyed the exercise and have no regrets about doing it. It is years since I wrote a detailed explanation of WTC collapse basics and it was time to refresh my own stock of explanatory posts. None of which excuses Clayton's rudeness and related dishonesties.