i think getting rid of guns would have to help. i mean it must take a bit more effort to go up to someone and physically attack them with the chance they could defend themselves, grapple your weapon off you, etc compared to pulling a trigger.
i know if someones determined to kill they still will, but there'd be a lot less innocent victims with driveby knifings or self-inflicted woundings from forgetting the safety on your baseball bat.
and i hadnt seen stats for those other countries, just v responsible european ones. so oops i concede that point.