Fair point. But it's harmful, and anything harmful should be abolished.
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And then there are tenfold more where a gun has just been a liability and had someone killed.
Your argument is like praising Nazism because it brought Germany out of it's depression, which is one good thing. Then you look on the flip side of what is actually happening and you realize "Oh shit this is causing a lot of problem". I don't know if this is actually true but it wouldn't surprise me if the 2nd amendment has had more people kill that WW2.