If owning a gun was difficult, people would not use their hard earned legal fireams in crimes. If you are handed out a gun just because, the tendency to use this gun in an illegal manner is way higher.
However, owning a gun does not make you a killer. My guns could lay around my apparement, fully loaded, ready to fire with their muzzle pointing at people and would not shoot until someone pulls the trigger (note to the friendly government agent: this is a hypothetical statement, my guns are not loaded, not pointed at any human being and safely stored away in my safe).
There has to be a restriction of some sorts to obtain a gun, but no restriction in the type of firearm or attachment.
I would not want every lunatic to own a gun. Those that are mentally unstable or otherwise disabled need our protection since they can not protect themselves. The way the USA handles firearms is, in my opinion, too lash, the way Germany handles gun laws is too strict.