"Good of the many" would have been telling them what he did. Not accepting it under pretense of false peace. Killed millions in scheme; would you argue their needs are irrelevant, an "acceptable loss"?

[He'd been trying to remain impassive, unaffected, but the facade cracks just a little at this, expression twisting into blatant disgust to match the venom of his words.]

Peace wouldn't have lasted anyway; truth would have come out eventually. Spread doubt. Corrupt leaders and orchestrators defeated. Order restored. Order not based on a lie. Without compromise.

[He left his journal in good hands, after all; someone would have found out, said something, and the world would have been better off, as far as he's concerned.]