Obviously war can benefit the state so it becomes a simple cost benefit analysis. Execution does seem to be irrational when you could instead force them into a lifetime of involuntary servitude.
I assume you're giving numbers from one specific year?
I'm not asking to imply you've cherry picked numbers, just that giving stats like that (number of actions for a country with no defined time period) is only telling half the story, and even though that half was enough to make your point I think the other half is worth including for the sake of curiosity :)
