I am in no way claiming that the other speaker has integrity, I have seen him acting like an ass in other interviews too. My point here in relation to that video has only been that ad hominem attack shows an inability to think clearly and with balance - it also shows undercurrent intent that is dishonest and unproductive. I can be triggered into it myself in extreme situations and I know it doesn't help anything.
When it comes to 911, not only did he say that he was fore-warned of the towers' collapse at a time when no-one publicly had any evidence or expectation of their collapse, based on the structural engineering involved (even the NIST report said that these collapses were the first of their kind in history) - but he did nothing to advise others of the collapse AND most importantly, later LIED on camera - as shown - by saying he didn't have any foreknowledge of the collapse. Why would he lie?
RE: Rudy Giuliani's Meltdown. Who's The Real 'Moron'? Solid Evidence Shows He Lied About 9/11 Foreknowledge