Gun makers are businesses that try to make money, just like any other business. Also, would we hold a company that makes knives responsible in the event that their knife was used in a stabbing? Or would we hold companies that make lighters responsible in the event of an arson? Guns can protect people, but they can also be misused. It depends on the consumer- much like the fact that opiod drugs can be used for good but can also be abused by the consumer. Should we hold pharma companies reliable?