The study doesn't say who is shooting all these black people, so we can't ban any particular race for that reason. For all you know it's the Hispanics and Asians shooting all the blacks.

And suicide should be legal. You should be allowed to end your life. And you should be able to end your life how you want to, within reason. But frankly shooting yourself at home is much cleaner for society than, say, jumping off a tall building.... splat! So I don't think we should ban guns because one particular race or another is frequently killing themselves with guns. Because in addition to suicide being permissible, it's also not like shooting yourself is the only way to end your life. People will find other ways if they are committed to killing themselves.