The US citizens need guns to protect themselves from the upcoming zombie apocalypse. In the documentary "The Walking Dead" it's been proven that you're shafted without lots of guns and ammunition at home.
Then there's the documentary "Red Dawn", where you can clearly see that due to the looming Russian (or, in the latest edition, North Corean) invasion, it's better to be armed with automatic rifles.
Also, an AK47 at home makes small penises look bigger. FACT!
"There is no right life in the wrong one." (Theodor W. Adorno, philosopher)
"Only a Sith deals in absolutes." (Obi-Wan Kenobi, Jedi)