I don't see anyone (especially GingerBill) stating that article about Odin was deleted because of "political bias". The only thing I see is a general statement about Wikipedia being an "ideological playground". But I don't see that anyone thinks that people who removed the article were of the opposite views. The author makes the connection because of some Twitter accounts that GingerBill follows (and because of what he allegedly said in some videos), but I don't think it's a good proof, especially by the author's own standards.
Right before the statement in Wikipedia being an ideological playground:
> Our best hypothesis is quite simple: some of the mods just don't like Odin as a language and don't want it on Wikipedia as any form of "advertisement".
It doesn't directly say "political bias", but it certainly is implied (not as in national politics, more like ideological)