All a matter of perspective, I think.
Poll some Israeli's, find out how early they begin weapons training. ( I honestly don't know, but I think it's pretty young)
So, I think the age is a non-factor. Experience, and knowledge (or the lack thereof) is the important thing here. Equally as important would be the lack of CLOSE supervision for the kids first time at it. I.E. Dad being at his side so the kid got the feel for it, first. Instead, this love muffin was grabbing for the camera. Great parenting practices, Chuck.
It is directly, the father's and instructor's fault. Father, knowing the child had never fired an Uzi before, and the instruc-tard for not asking or assisting the kid, himself.