When you have tens of thousands of autists weaponizing that shit, you will have plenty of ones whose speculation goes awry, come to weird conclusions, and become certain of things entirely based on their hunches. That's the trouble with conspiracies, you are building narratives from fragmented, coded ideas and then welding it together as best you can. Sometimes it uncovers reality (McCarthy) or sometimes it becomes something beyond reality (later McCarthyism).

That's not even getting into the idea that the entire pizza parlor was a false flag, which even if the idea itself wasn't, the shooting almost certainly was.