It's difficult to say anything about this issue, because I don't think that allowing the public to own guns is wrong. I think it's insane, ridiculous and irresponsible.
I understand that people want to own guns, in the same way that people want to be able to drive without speed limits, have monkeys as pets and numerous other stupid things.
Of course a government shouldn't control every aspect of our lives. People should be allowed to smoke cigarettes, drink large servings of sugary drinks etc.
However at the start of the thread someone posted a link from a so called liberal suggesting that owning guns was a human right. It's a valid opinion that people should be allowed to live their lives without interference of any kind from government, but it's hardly liberal. If you give people the right to own all and any guns, you should give them the right to create and own weapons of all kinds including biological agents, explosives and nuclear weapons. If a Libertarian proposes this, then fair enough, but a liberal???
Surely most people would accept limitations on universal personal freedoms. There has to be a line somewhere, and to believe that line should be drawn where it currently is in the USA is, as I say insane, ridiculous and irresponsible.
So, then there's the argument that you can't change things. There isn't a law in history that hasn't had people saying things like, 'You have a good point, but the South will never give up their slaves'. Lets just keep things as they are and value the hypothetical possibility of failure above the actual historical incidences of success, such as Australia.
American politicians are prostitutes, selling themselves to the highest bidder, invariably the NRA. This doesn't just affect guns. The NRA make their poodles toe the line on absolutely any policy that could possibly have consequences for gun ownership.
Most countries, as some people have pointed out, allow some form of gun ownership. There isn't a country in the world where knives are banned, and even if they were, you can't even keep weapons out of prisons as log as you have a sock and something hard to tie inside.
It's not about guns. it's about sensible restrictions on freedom for the greater good.