I remember reading somewhere, that "Nazism" means something rather different in Russian culture than in Western culture. In the West, you say "Nazi" and the first thing most people think of is the Nazi mass murder of Jews, the Holocaust–that's what the school curriculum focuses on. But in Russia, you say "Nazi" and the first thing most people think of is the Nazi mass murder of Russians–that's what the Russian school curriculum focuses on. In the West, "Nazi=homicidal anti-semitism"; in Russia, "Nazi=homicidal Russophobia".
But, given that, what sense do they make of a group of Russian "Nazis" who support the Kremlin and fight its wars? It is a bit like if you met a group of neo-Nazis, and discovered they were all openly and proudly Jewish. If something doesn't make sense, people often just choose to pay no attention to it.
Similarly, the Russian accusations that Ukraine is a "neo-Nazi regime" seem ludicrous to Western ears – "Zelenskyy is of Jewish descent, his great grandparents died in the Holocaust, how can he be a Nazi?" But to most Russians, for whom the primary meaning of "Nazi" is not "antisemite" but "Russophobe", the idea that "Ukrainian nationalism=Nazism" makes more sense, and Zelenskyy's Jewishness appears irrelevant.