You have replied to my post but only 2 sentences are relevant to it, so I’ll ignore the rest.
<i>There is clearly much about the 9/11 attacks that we have not heard the truth of, and a more thorough investigation would be a good thing. But there is a chasm of difference between “spoke at an event hosted by” and “agrees with every line of”. </i>
Nobody agrees 100% with anybody, so your point is trivial. The actual point is that an intelligent well-informed person, personally known to and respected by someone we both know and respect, chose to support such an event in the full knowledge that his support would be scrutinised. My secondary point is that he cannot be dismissed as naive.