A picture says a thousand words

[Mystical]

Technically the Chinese invented guns in the 13th century (300 years after gunpowder was invented). From there it spread west to the Middle East via Mongols. Obviously gunpowder was invented for reasons other than to kill people, and remained that way for three centuries. [quote=Wiki]
Gonna blame the Chinese people as a whole--much less the single person who came up with gunpowder, for how it was used? Or are we going to hold accountable the guy **who took an innocuous in invention and wielded it into something with which to hurt others**-- and the subsequent killers behind the guns? 
The same goes for nuclear bombs. Ever heard of a nuclear power plant?? Rhymes with nuclear bomb doesn't it?
Anything in this world can be weaponized. It's only the wise, who avoid strife altogether.
I could give two inmates forks and one would eat with it and the other might stab his fellow inmate with his fork. Even if I gave them the fork, it doesn't mean that it's my fault someone stabbed another with it. Not unless I knew that the inmate was mentally unsound or had a history of violence. I don't blame the fork maker, either, for inventing forks. Humans stab other humans for many reasons, with many different instruments. Statistically, in the case of guns and current (and most especially past) wars--their primary motivations are based upon religious texts, which claim that supreme beings gave them the instructions and reasoning for a Neverending war. Meanwhile scientists are working to remove the underlying issues (such as energy shortage or food famine) for the wars themselves. Science is even proving that there were no supreme beings needed in the first place, for life to form thus making those religious texts irrelevant and the bloodshed, demonstrably unnecessary.