Take into count that every population can be trained during the time.
If the one next to you thinks you're doing wrong, you know others thinks you're doing wrong.
Try to list all the things that you indeed think are "wrong" and you'll find many. Thats your culture.
If a population culture is "i don't like weapons", most of the population would not take one. The "no weapon" plan should be indeed long and calm, to work. I see no chances to change it in a couple of days.
Some of those "no-weapon" guys will die, killed by a criminal. That's sure. But also, they will die even with a weapon in their houses. The criminal kills you 90% of the times, since it's an ambush you don't expect.
With or without weapon, i see no improvement in the society defense.
Without weapons there are less criminals (because the weaker ones are unarmed, instead of armed)
With weapons you can defend but there are more criminals (the weaker ones are now stronger).
Is just like give a gun to all Salem's players to prevent pvp. Or, like H&H, add "permadeath to prevent pvp".
You will see more players shoot with their guns and more experienced player die for a lucky shot.
The sum is that i see no improvement to the defence when you have a gun.