It feels revisionist to suggest no one knew Saudi Arabia was involved in 9/11. Evidence was there even as hawks pushed for war elsewhere. It was ignored because it was politically and economically expedient to do so. Saudi Arabia continues to wage war on the US (and democracy in general), but because they have a lot of money and a lot of ties in business (tech, too) everyone pretends the Saudi royal family isn't plotting to murder Americans and destabilize democracy. https://www.theatlantic.com/ideas/archive/2024/05/september-11-attacks-saudi-arabia-lawsuit/678430/