Some are mad because the album cover of the towers was taken after the music was already recorded and thus feel it disingenuous for Basinski to sell everyone on the idea that there was some deep connection or meaning between the two and to use that for attention/money/praise. The story has also been exaggerated and mythologized over the years by fans

Personally idk and idc, I listened to it for the first time without knowing the 9/11 connection and still banged crazy