That a military AI helps to kill enemies doesn't look particularly "unsafe" to me, at least not more "unsafe" than a fighter jet or an aircraft carrier is; they're all complex systems accurately designed to kill enemies in a controlled way; killing people is the whole point of their existence, not an unwanted side effect. If, on the other hand, a military AI starts autonomously killing civilians, or fighting its "handlers", then I would call it "unsafe", but nobody has ever been able to demonstrate an "unsafe" AI of any kind according to this definition (so far).