Because statistics are easily twisted and often nonsense.
For one, homicide includes the killing of a human by another under any circumstances. This would include self-defense, which is what would happen when one has a gun; among other things.
It takes no account of cultural differences.
If you take away legal guns, only the bad-guys have guns.
Well I did know that. I just don't understand the whole youth-politics group thing. It just seems wrong and exacerbatory to divisions to me, especially conserning people under 18-21.