Conspiratorial thinkers are more likely to believe that Osama Bin Laden was already dead and is still alive rather than the official narrative that he was killed on the day reported. https://www.researchgate.net/publication/235449075_Dead_and_...

In general, you can't argue or 'fact' people out of beliefs they were not argued into. The best you can do is give them a safe place to land when disconfirmation begins. Don't be too judgy, no one is immune to propaganda.