Yes, I agree, why is it some just want to believe this is a something that it is not?
I think that the reason is that we are so distrustful of the government. For good reason. The 9/11 attacks are a good example of why we shouldn't trust the government. However, a shooting on this large a scale would be difficult to fake.
I think that the Sandyhook shootings were probably fake (though I could be wrong), but that was on a small local level that could be controlled.
My husband and I travel to Las Vegas once a year to visit my elderly aunt and uncle, who have no family nearby at all. My husband insists on staying at hotels on the strip, since he's a builder and likes all of the wild architecture there. I have tried to talk him out of staying on the strip, but to no avail. I am familiar with the area where the shooting occurred, and even once attended the Novus Ordo church for Mass on Sunday, located right next door to the arena where the shooting occurred. Now I attend the local SSPX chapel in Las Vegas, when visiting.
It's really weird to see a shooting take place in an area that I'm familiar with.