Calling “idiot” ableist and insinuating that it is a slur is completely ridiculous. Do you mean because of, like, 1920s IQ testing that used such terms to describe low scorers? “Useful idiot” is essentially a politically-specific version of calling someone a “dupe”, it has nothing to do with mental disability except on an etymological level.

Anyway, I consider false and slanted accusations coming from the west about its greatest opponent to be something that it does with purpose and therefore something we should be wary of being duped by.