People in this thread forget - Europe as a whole existed for far longer than US. USA is home for booming business, and not only IT business. Unfortunately as a consequence - "bad" people use weapons to fight for their place under the sun, that's why police here works with high violence expectations first. This soaks into mentality, because humans are built this way. That's how you get officers who ready to taze/shoot for minor traffic violation.

So solution is not remove guns, but remove "bad business". How to do that - different question. Legalization vs Extermination - yet to see which one is more efficient.