I think Mussolini counts. I don't have the original reference, but Mussolini argued that ethical relativism licensed Italians to champion and impose their values upon whomever they felt it appropriate to. Given the premises, Mussolini's conclusion seems inevitable.
Edit: found it
Everything I have said and done is these last years is relativism, by intuition. From the fact that all ideologies are of equal value, that all ideologies are mere fictions, the modern relativist infers that everybody has the right to create for himself his own ideology, and to attempt to enforce it with all the energy of which he is capable. If relativism signifies contempt for fixed categories, and men who claim to be the bearers of an objective immortal truth, then there is nothing more relativistic than fascism. —Benito Mussolini, Diuturna (1921)
Thanks. It's very interesting that Mussolini labelled himself a moral relativist. But I'm not sure he was using the label consistent with how moral philosophers use the label. Consider the inference he draws from the falseness of all ideologies:
the modern relativist infers that (A) everybody has the right to create for himself his own ideology, and (B) to attempt to enforce it with all the energy of which he is capable.
(A) is a straightforward conclusion from anti-realism - although I'm not sure every moral anti-realist endorses it.
(B) comes out of ...
From Being a Realist (even if you believe in God):
My mother, who doesn't call herself a theist (I think she's agnostic), doesn't even accept realism. She doesn't even agree with this:
That's little more than tautologies here. Yet it elicited an impression of being forced to believe. I know because she told me about the totalitarian dangers from such narrow thinking.
I'm happy to have finally found the root cause of our ongoing disagreement, but now, how can I deal with that? It looks pretty hopeless, but just in case, does someone have a suggestion, or should I just leave it at that? (My ego doesn't like it, but giving up is an option.)
Now I'm relieved to know that in near mode, she's a complete realist. This craziness only shows up in far mode.