Oops, the Deep Staters didn’t figure in a good guy with a gun. They may have to do that from now on, at least in places that AREN’T New York City. D.C. etc, as more sane people are arming themselves against the evil that is being intentionally expanded throughout the nation and the world.
You can bet that future actions like this that are in fact Deep State operations will include a covert support person whose task is to take out the Good Samaritan. After a few GSs get killed trying to take out an active shooter, the rest of us will be less inclined pull out our weapons.