Yes, ad-O's analysis seems pretty crude. I don't think you can talk about the white working class or the white European male as homogeneous categories.
My memory is, in any case, that fascism and far-right groups tend to appeal more to middle class people. For example, in Germany many workers voted left, either Social Democrat or Communist, and not Nazi. But this in itself is a generalization, which merits closer scrutiny.
There is also the difference between holding power and not. I mean that far-right groups tend to be populist and anti-elitist, when not in power, and they get their appeal partly from this, but if they achieve power, they are often hierarchical and of course, authoritarian. So you get a different elite.
It would be useful, for example, to look at the appeal of Le Pen to different sections of French society, but it would be also somewhat tedious.