^
"...a state lawmaker explain(ed) that knives aren't defensive weapons. Knives are the weapons of criminals and killers who want to strike quietly and flee."
Ah, but Mr. All Wise state legislator... you don't know how to read plain English.
Knives are "arms." too. And you are pre-assuming (presuming) that they will be used in a criminal manner and cannot be used in a defensive encounter.