I don't really see the threat considering how much cheaper and more effective it is to give that weapon to a young man rather than mounting it on that expensive robot.
The threat is to anybody who those in power label the out-group. For too many people, risking lives of the the "good guys" is the only cost weighed for violence.
Tell that to the guy balancing the military pension and medical compensation books.
Its a lot easier to find robots willing to massacre innocent people.
That's demonstrably false
ICBMs?
I believe that's BrainInAJar's point: the number of people killed by regular ol' humans with weapons of war is massively dwarfed by the number killed by drones. ICBMs (to my knowledge?) haven't actually been launched in a war ever, so their kill-count is "0".
This solves the General problem, from Bertolt Brecht's poem :)