"the law requires every graduate to be an officer, so killing officers is actually killing the intelligentsia"
Um, maybe if you don't want that to happen, just... don't have that law? This is like conscripting child soldiers and then complaining that your enemy is murdering children. Like, if you're actually fighting a truly desperate conflict against a genocidal foe, like the Soviets against the Nazis, some desperate measures can be justified, but this is interwar Poland we're talking about here.
We've fully entered the "killing soldiers is actually genocide" phase of rhetoric (except when Western countries actually kill civilians, that's just regrettable but unavoidable collateral damage).