Note that to the Left, “use” in this case means “shoot”. In most instances where an armed citizen uses a gun to stop a would be mass killing, all he had to do was display his gun to the attacker. The Left is incapable of acknowledging the mere presence of a lawfully owned gun as a valid deterrent.
And of course, if there are not a lot of people killed then it does not count as a mass killing. As an example which the Hollywood Left might understand, note the end of the movie “Source Code”: the project was considered an abject failure because it was, in fact, a complete success in preventing mass death.
Using guns to stop “gun violence” is simply ruled out by the Left’s axioms. It is a fundamental rule, not open to debate.
In most instances where an armed citizen uses a gun to stop a would be mass killing, all he had to do was display his gun to the attacker. The Left is incapable of acknowledging the mere presence of a lawfully owned gun as a valid deterrent.
I've been looking for stats on this, on the fact that in most cases the sole display of a weapon by a lawful citizen stops an hell-bent killer. But I have a hard time finding them stats. It would help when debating lefties.