Are parents responsible for the actions of their children? They created them and raised them and trained them and educated them.
Defective autos cause deaths. Are the auto manufacturers responsible?
Cigarettes caused lung cancer deaths. Are cigarette makeres responsible?
Guns cause deaths. That is the purpose of a gun. Are gun makers responsible?
If these sources didn't create the instruments of death they would not happen. Cause and effect.
Imagine a world without cigarettes or autos or guns? Well our world used to be that way. Was it a "better" world?