[_gccu]

My argument that you missed, is that this is the poster's personal subjective opinion from the POV of someone who doesn't have skin in the game.

My "there are other people who disagree" happen to have skin in the game (US people on US soil who suffered the 9/11 attacks). Look up Nassim Nicholas Taleb.

If you're gonna say that US people's opinions are also subjective personal opinions, then I'd argue that their subjective opinion still has stronger claims that 9/11 is a national security issue, because they have concrete provable injuries. Compared to someone far away who doesn't have skin in the game and didn't lose anything.

Check your biases and conflict of interests, maybe.

p.s. Plenty others here have added well laid out arguments so I didn't want to just add more of the same.