Uh, restrictions in Chicago aren't going to work if I can drive 5 minutes and buy a gun. That's pretty lazy, imo, in terms of arguments.
Of course there are other issues, but the top issue is, imo, it is really easy to get a gun. Really, really easy.
"the US is unique", that's the same argument against socialized medicine and any other thing that most of the right doesn't want. It's a weak argument. People and societies change, look at how much changed with gay marriage in the last 10 years. If we wanted to, really wanted to, we could change gun beliefs and laws.
I know I have a zero percent chance of changing anyone's mind here.