HOPLOPHOBIA
Hoplophobia is an irrational and morbid fear of guns, a term coined by Jeff Cooper, from Greek "hoplites," weapon. Symptoms may include discomfort, disorientation, rapid pulse, sweating, faintness and more, at the mere sight or even thought of guns. Hoplophobes are common and should never be involved in setting gun policies, though many are hard at work in the rights-denial movement, and are arguably the greatest threat in the debate. Point out hoplophobic behavior when you see it, it is dangerous, and sufferers deserve pity. A hoplophobe (HOP-li-fobe) can often be cured by training, or by a day at the range. (www.gunlaws.com)

and then there's the opposite, which I think someone here coined...

"Hoplophile"

And here I thought that the opposite was Hopalong (Cassidy)...

Jeff Cooper gets credit for that one too.  I'm just borrowing it.