So you believe, however, that doesn't make it true, and the premise is specious owing to a lack of evidence, for it is nothing more than a belief system driven by confirmation bias and irrational suspicions based thereupon. The CT crowd have been saying this regarding every mass shooting for some time and the so called hypothesis lacks evidence, and is somewhat incredible owing to the magnitude of the conspiracy and the fact that not a single individual has come forward as a whistle blower, not to mention a complete lack of evidence.
Again, that is merely a conclusion reached without evidence and based upon nothing more than confirmation bias. Every tragedy is a false flag for some asinine attempt by the government to limit one's rights or start some war: 9/11, the Boston Bombing, Aurora, Vegas et cetera ad punctum absurditatis. Furthermore, it is always internet dwellers who possess poor skills in logic and lack the ability to process evidence who make these claims, and never qualified investigative journalists and LE professionals.