It's relevant information imo. The whole "separate the artist from the art" is such nonsense. The only people who want to separate the work from the people who create it want to get rich from somebody else's work. There is a dearth of surrealist art that is largely antifascist, but the only surrealist artist that most people are aware of is by a fascist who was rejected by the rest of the movement in his own time.
Art isn't just a picture or aesthetic experience, it is a relationship between the world and the people in it. You can look at art throughout history to understand culture, and culture is where people derive their sense of morals and truth. Fascism, by its nature, works to dissolve truth and culture into relations of naked exploitation. Dali was a good painter, but there's no shortage of principled criticisms about whether he was a great artist. So he doesn't objectively have amazing art. On the contrary, objectively, he was quite shallow and self-obsessed, and if art imitates life, what it is his art imitating -- the world around him, or the shallow and self obsessed artist himself? Perhaps that is the root of his fame, its incredible lack of substance promoted by a class that does not value substance, since substance is not a consideration in profit.