Of course you can, but the carnage numbers achievable with a knife, hammer or anything else pale in comparison.
Please stop using this ridiculous argument.
Unless you have a successful counterargument, no.
The point is, you can can kill anyone with anything. It's not the implement, it's the intent. The desire to kill, the desire to harm. Guns are made of springs, metal, and gunpowder. Leave a gun alone and it won't kill anyone. Take up the gun, aim it at someone and shoot them, then you will soon discover that it wasn't the gun who killed your target.
It was you.
The desire to kill isn't influenced by what you used to kill, it was influenced by whatever inclinations you had toward your victim.
So, is there any more ridiculous nonsense you want to spew at us today? Please, learn basic human psychology before lecturing me about what arguments I can and cannot use.