Honestly can't say I personally disagree with that statement. But I don't believe that people are born with low IQ. And it's on the education system to teach them responsibilities and respectful behaviours. If you can teach that effectively, I think violence will drop and the majority of gun owners will be able to carry on without a minority ruining everything for everyone else.

That being said, sadly there's no IQ test for ownership of anything. The problem with as you pointed out in a different reply about felons and gun usages, because guns are easier to get hold of they have less obstacles to overcome to enact violence. If every home in America (I know not all of them do) had a gun, it just means that although felons aren't allowed to own one... They still have access via theft (and that's not exactly something they won't do) or any other illegal acquisition. If guns were less available they'd have less ability to get one (by any means) and therefore less ability to use one.

I understand the arguement about ownership for protection but you can't ignore the fact that widespread gun access gives the wrong people the wrong weaponry.