Might be more accurate to say that guns *facilitate* crime. But, guns facilitate crime so much that it’s hard to parse that distinction.
Killing people with a gun is far easier than with a knife. It makes killing possible in a wider variety of situations. Like the Las Vegas shooter. If he’d been limited to flinging knives out of his window, or even a standard handgun, he would have been lucky to have killed anyone. His crime was only possible thanks to the 20+ AR-10 and AR-15 rifles he had stockpiled in his room.
He could have hatched a different plan to go on a stabbing spree, in theory. But the toll would have been far less than the 60 dead, and 800+ injured by his rounds and the ensuing panic.
An extreme scenario, but gun violence is repeated at a smaller scale in incidents around the country to the point of causing tens of thousands of deaths per year.