[From Glenda T. Goode (who has a blog)(High Praise!)]
Having carried for years in the past I know that responsible people who are armed within a crowd, who otherwise are unknown to an assailant, can be the greatest deterrent to an event such as what happened in Pittsburgh Saturday. If any individual who is contemplating a violent act upon an unsuspecting congregation knew that it was highly likely that some people present are in fact, ARMED, they would be less inclined to conduct their attack
What the public, the left mostly, does not understand is that a person carrying a sidearm is the same as anyone else in a crowd. In fact, the crowd is safer for their being there. Responsible armed citizens are a tacit bulwark against acts of violence. The people on the left who are against the legal carry of firearms are around people who do so all the time and yet, they have no idea that they are around these people. They suffer no risk in these situations and actually benefit from the implied safety that having a armed individual provides by their presence.
The left considers any firearm dangerous even the ones held by law enforcement and private citizens. This exaggeration defies logic. In almost all cases, it is some deranged lunatic who is more likely to be aligned with the left’s agenda who shoots at a crowd of innocent and unsuspecting people.
If the media stopped aggrandizing every mass shooting in an effort to exploit the deaths of innocents for their political agenda, I believe most of these events would stop happening. I am quite convinced that the promise of notoriety that these events garner for the shooter is the motivating factor for many of them.

I think Andrew Wilkow puts it best:
Citizen A: Why do you need a gun?
Citizen B: To keep you from raping me.
Citizen A: But, I don’t intend to rape you…
Citizen B: Then you don’t have to worry about my gun…