We got it, the man has some weird ideas and he’s a bit clumsy when it comes to diplomacy in general. But frankly, he’s by far not the only one to think that 9/11 was an inside job. Look from left to right in the political arena of various countries and you’ll find numerous conspiracy “therrorists”
Bush (jun.) never liked the fact that there were conspiracy theories and even though I don’t agree with any single of those theories, I share the skepticism raised by those people. Some parts in the official story sound more like a contrived conspiracy theory than some of the purported conspiracy theories themselves.
The fact that EU and US delegates left the room only shows their “high” regard for one of the values of the self-proclaimed “free world”: freedom of speech. You may not share his opinion, you may not like his statements, but if you leave the room you damage your own reputation if you are trying to defend those values. Well done!