My thoughts exactly.
Why on Earth would you try to create such an elaborate conspiracy which involves dozens and dozens of people, when you could just organize some shooters to actually do the deed?
If you're going the "crisis actor" route, you open yourself up to so many dangers. First, those crisis actors better be fucking great actors, because your while conspiracy relies on them being believable. You also have to rely on NONE of those crisis actors blowing the whistle and becoming one of the most famous people on Earth ("Whistleblower reveals US government responsible for school shooting!"). Plus you have to rely on the actual people from that town not realizing that these "neighbors" were fake, or even more insane, you have to get the whole town on board, plus the emergency responders at the scene. Then you have to hope that no journalist will find a loose thread and unravel the whole story, like, I dunno, finding out about the crisis actors previous life, before being hired to play someone living in the town.
So, you can do all that, then cross your fingers and hope it all goes to plan... Or you can hire one or two guys to actually shoot up the place, then kill them once they're done.
Yet, for some reason, conspiracy theorists think the first option is more likely.
