Palestinian youth shot as he tries to flee

A 15-year old Palestinian was accused of rock-throwing. He was handcuffed and blindfolded. Stupidly (What does one expect from a teenager?), he tried to flee. An Israeli soldier shot him! The youth is alive as he was only shot in the groin

Shouldn’t guns be used as a last resort? Shouldn’t lethal firearms be used only when there is a serious threat to be countered?