If it is their modus operandi to enhance their power and prestige with false flag operations written small, it's more credible that they would be willing to do

If it is their modus operandi to enhance their power and prestige with false flag operations written small, it's more credible that they would be willing to do so at scale. You can find any number of conspiracy theories that the FBI created the circumstances that empowered themselves, for pretty much any attack you can name. The behavior described here makes those accusations less incredible.