When a car is stolen and used in a bank robbery, DUI, or other crime, nobody seriously suggests the rightful owner of the car should be held to account for the crime committed with the car. This remains true even if the car was stolen while it was left running and unattended (such as being left in a driveway to warm up in the winter). But if someone comes home to find their front door violently kicked in, the house ransacked, and a firearm missing, suddenly the gun grabbers want to hold the victim of these crimes responsible for all future crimes committed with the stolen gun.
With an ounce of honesty, it would be clear that the real problem is criminals. Criminals who steal stuff; criminals who buy and sell stolen goods; criminals who engage in violent crime. But such truth doesn't advance political agendas.