"If we get rid of guns, no mass murders!"

Not so fast, Sparky.
27 people are dead and another 109 are wounded following an attack by “a group of knife-wielding men” at a southwestern China train station, the Associated Press reported Saturday, referencing “the official Xinhua News Agency.”

The attack, “one of the deadliest ... in China in recent years,” resulted in several attackers, reportedly wearing uniforms, being shot by police, but not until after they’d managed to kill and injure so many defenseless people at the station.
When you've got a population that's both unarmed and trained to depend on the State for everything, it doesn't require guns to pile up a body count.