Not new. In 1937 I saw a movie called "They Gave Him a Gun" starring Spencer Tracy and Franchot Tone. Two World War 1 soldiers had distinctly different reactions to their weaponry after discharge, with one shootin' up the place.
I was young but recognized propaganda when I saw it. Besides that, everyone I knew in Southwest Oklahoma had pistols or rifles and knew how to use them.
You saw a movie in 1937 (68 years ago), and you remembered it, as well as the stars? I was born in 1937 and I can't remember who starred in last nights TV movie. God bless you.