The irony here is that the NRA is responsible for making sure thugs and terrorists are well armed, which is probably why the thug has a knife rather than an AR-15 clone.
Although, NRA policies have made sure that the weapons you believe will protect you are firmly in this thug's hands.
He doesn't need a knife--he has your gun.
Why else do they fight the laws that they not only once supported, but even proposed?