Could equally have quoted G.Mosca, that power must sometimes circumvent norms or use extra-legal means to preserve the system.

Churchill would not have approved quoting a Nazi to buttress an argument.

I can denounce Nazis while admitting an objective point made by Schmitt. Churchill himself was a ghoul who considered Indians, Africans, etc. inferior and while he denounced the Nazis' tactics, he had no problem using similar ones to suppress colonized natives.

In other words, Churchill might have hated the Nazis (because they threatened his beloved England), but he believed in the state of exception they promoted. He believed he wasn't obligated to obey basic decency when dealing with non-European natives because, like Schmitt would say, "sovereign is he who determines the exception."