Ovinomancer
No flips for you!
I would instead argue that they perpetuate violence because they undermine the means and the habit of coming to mutually beneficial and acceptable arrangements. Arming oneself is fundamentally a statement "I will kill you rather than deal with the issues which create hostility." I argue this is a fundamental issue in contemporary society, though I think we should not pursue that discussion here, it would be best taken elsewhere.
History is replete with armed men of violence coming to mutually beneficial and acceptable arrangements, though. Feudal Japan is not remarkable in it's time for it's level of violence. Neither was the Wild West. Both were largely peaceful and most people got along just fine, including the armed ones. You seem to have a Hollywood version of history.