You've conflated 9/11 with the invasion of Iraq. This is pretty ironic considering this is exactly what the US and British governments did and what they tried to convince the "unthinking people" of.

The Minister to whom you refer resigned because of the hysteria and lies which led to that invasion. This is totally separate from the idea that 9/11 was an act of the US government, which is something he will almost certainly find implausible. 9/11 makes no sense as a false flag campaign for an Iraq invasion because the supposed scapegoats, Al Qaeda, were never shown to have any connection to the Iraqi government.