He should be denied because (1) he isn't fully White yet poses as such, and (2) under the cover of being well-read and knowledgeable he pushes subversive ideas that are just as bad as any of the things he claims to be reacting against. For point (1), he is part Turk - this really starts to raise eyebrows once one sees how over the years he has gradually stepped away from pure White Nationalism / National Socialism. This mainly seems to be (so he says) because the movement IRL is so full of "low quality people". Instead of not throwing out the baby with the bathwater, he seems to think that the entire idea is contaminated, which is obviously false. On top of all this, he is not as redpilled as he thinks he is if he thinks that working through the established parties will do shit.
I don't want to come off like some blind hater. Cultured Thug played a big part in getting me to really hit the books and deepen my knowledge of Fascism, but there quickly comes a point where you become more redpilled than him and realize his many flaws. He's pushing a subtle form of defeatism. It might not be purposeful, but it's there nonetheless.
I think Codreanu's book was genuinely good. Very powerful, and with how the Romanian government acts against the Iron Guard in that book, you can really see a lot of parallels between then and now. For that I can appreciate Codreanu, but you're right that there is fundamentally a deep form of cognitive dissonance at the heart of what he and his followers believed about the Jews while being Christians. If the Jews had converted to Christianity, Codreanu would have no choice but to accept his new brothers :^)