(B) follows from (A), at least if we take (B) as elliptical for
(B') to attempt to enforce it, if the ideology indicates that this is valuable, with all the energy of which he is capable.
And Mussolini's ideology presumably did indicate that enforcement of Italian values is valuable.
In the case of Mussolini, it turns out that the value system he adopted "valued" being imposed on others. But the quote you found suggests that he might have known this in advance - before he knew anything concrete about the value system he would adopt. That's not something that moral anti-realism says you can know in advance.
More realistically, it's likely that Mussolini choose his value system with knowledge of the contents, and specifically picked one that called for it to be imposed on others. But using this quality of the moral system as ...
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.