Sure...Let em kill those kids...as long as your family can hide their eyes and pretend it is not happening.
Out of sight out of mind. Huh?
I wouldn't take pre-teen kids to see Mel Gibson's The Passion of Christ, and I wouldn't put pictures from Auschwitz, Hiroshima, or Jeffrey Dahamer's basement on the sides of a truck and drive it around town.
I would be deeply concerned about two possibilities: one, that the kids would be shocked and horrified; and two, that eventually they wouldn't be.