I only “know” such things after I see the facts. Show me the facts that support what you claim.
The fact ia that bad guys look for easy marks, not people showing they are armed and will fight back. Bad guys are lazy, not stupid.
That's precisely what I'm talking about: neither the Chattanooga, nor the "Draw Mohammed" shooters broke off their attacks when faced with armed resistance.
Your belligerence and prove-my-negative challenge only makes you look foolish.
Do you really thing no one can figure out all "bad guys" are not lazy opportunists?