Regarding the Sandy Hook 'conspiracy'. Apart from the fact that I have such a lot of sympathy for the relatives who have been hounded and told they are actors and their children didn't exist. I don't see why anyone would go to the bother of staging a mass shooting. There are websites that actually say there wasn't even a school there.
The people who believe this think it is all part of a plot to remove guns from the general populace and launch a deadly depopulation attack on the citizens who will then not be able to retaliate. I have seen a few Facebook posts from pretty ordinary relatives in the US who have said as much.
The thing is, if you are the evil state, why not just send a trained shooter in to kill everyone, then plant a gun on a teen and make it look as though they had turned the gun on themselves?
That is if you believe that it is fake at all.
Personally, I just think there's a tragic crisis in teen mental health in the US (and to a lesser degree here in the UK, but we're not awash with guns).
I think the same goes for lots of the false flag claims, they are just too elaborate. Why employ actors? Why not just plant a bomb/shoot/stab/drive a van or truck?