"Shall not be infringed upon" means just what it says. It's not open for debate. The 2nd Amendment isn't just about hunting, and, protecting ourselves from enemies & criminals, it's also about protecting ourselves from an overzealous, power drunk, unchecked government.
Leading cause of unnatural deaths in the 20th Century?
Democide. 263,000,000 killed by their own governments. The majority of them communist.