Yes, that’s the whole point! The suffering was not necessary! It was indeed bad.
Well then what’s the point of the counterfactual? The only two possible futures aren’t “no genocide and no democracy” or “genocide and then democracy”. There’s definitely a third possible future that’s “no genocide and also democracy”, so why as a hypothetical time traveller with full foreknowledge shouldn’t you strive just for that?
“They enslave their children’s children [those] who make compromise with sin.”