Whenever you get the old chestnut of "Guns don't kill people, people kill people", respond with this:
"Guns don't save people from gun violence, people save people from gun violence."
And if any American who likes guns tries to point to Finland, or Israel, or another country like that as "proof" that more guns make it better, just point to Australia - in many ways, Australian culture mirrors American culture. Indeed, prior to 1996, Australia's gun crime rate was very similar to America's gun crime rate. Then there was a gun massacre, the worst in history (at least at the time), and even the most conservative politicians decided that gun control was essential.
The prime minister at the time, who was a right-wing conservative leader, established a gun buyback scheme and laws to control gun violence. Since then, our gun violence has dropped dramatically, making us a country that sees far less gun crime than America. Here's a graph showing the change in firearm homicide rates (and non-firearm homicide rates, to show that that rate didn't increase to compensate):








