> his claim that the US never killed Osama bin Laden
You give a link but it is nowhere in that link. I watched an interview where Hersh talked about how the US killed bin Laden. Hersh has always said this.
Hersh did do reporting that countered parts of the US government story about bin Laden. Namely the idea no high Pakistani army/intelligence/government official knew where bin Laden was in Pakistan. As well as some other things.
The conspiracy theory is believing bin Laden sat in a big compound in Abbottabad with no one important in the Pakistani government knowing this. I guess the US government feels it needs to state this for some diplomatic reason, but it is ludicrous.