You seem to be somewhat evangelical yourself about both libertarianism, and religion (you linked "answersingenesis.com") so maybe you should stop with your crazy accusations and accept that most Atheists just wish the religious would shut up.
Loss of productivity due to needless changes = Bad.
So I could legally manufacture a more-or-less perfect replica of the gun used in Newtown.
I'm pretty sure you couldn't, certainly not without about ten years of practice and $100K worth of equipment. Of course after all that time and practice you'd probably be considerably wiser and realise that there's no point.