Cars kill people in accidents[1]. Guns are used for this on purpose. By your logic, we should also ban food because it feeds the people using the cars and the guns. Guns can still be used in the military, nobody ever argued that (vis-a-vis to you comment about Hitler & the russians). And btw, about those russians, they found new ways (tools invented by the americans) to screw with the world, didn't they? How are guns defending us now?

[1] in recent years, terrorists have been using cars to kill people too, but not the same extent.