Criminals will always have guns. ALWAYS. This is the single biggest factor that people who call for gun control fail to understand. A gun, in essence, is nothing more than a tool. It's no different than a drill, a hammer, a weed-whacker or a cheese grater. All tools can be used for actions outside their designs. A gun is a tool for hunting and protection. Violent people, even in the complete absence of guns, will always find a tool to use.

I think the main reason people call for gun control is to set their mind at ease. They don't care if criminals will always have guns, they only care that there is a law on the books to ban them. This is due to complete indoctrination and a desire for the state to babysit their fragile and childish mindset.