One possible response will be to compel every CCW to use their license and carry it! And if he see’s something like an Impala with it’s trunk puffing gun flash while people die, they smoke it. Maybe the terrorists take out more people but the argument for disarming the people is null and void the first time that happens.
Or, more likely, the gun grabbers highlight the first time a well-meaning citizen mistakenly shoots an innocent in a "smoked" Impala, and we lose by popular acclaim.
Understand the reality here. The Constitution relies on the will and vigilance of the majority of the people. And the majority of people could be indifferent today and admamantly opposed to the 2nd amendment tomorrow, leaving us in an unprotected minority very quickly.