Except that that's not at all true. http://www.motherjones.com/politics/2013/01/pro-gun-myths-fa...
I pointed you to stats which showed that people who carry firearms become more belligerent themselves, more likely to escalate an argument (because they know they can defend themselves) more likely to kill themselves or members of their families etc.
Far from "creating good behavior", firearms do the reverse by encouraging people who are weak, unstable, angry, depressed or confused to act out.