[samplatt]

>It sounds ridiculous to us

Not sure if calling your own example ridiculous is a good argumentative tactic in short-form debates like this...

>because our murders are by guns

Sure, but a cleavers' main manufactured purpose isn't killing other human beings. The guns involved in mass shootings are made specifically for shooting people en mass.

>If people in china are killing each other with knives, doesn't "smart" knives or knife registry make sense just like a gun registry?

No. Even though the barrier for entry for making guns is getting lower and lower, they'll never ever approach the barrier for entry for making an edged weapon.