Why is so much of the best Tolkien scholarship written from such a shallowly-politically-correct perspective?

...When Tolkien was himself such a powerful and influential opponent of moderenism and secular Leftism; and so persuasive an advocate of traditional society and of Christianity?

I answer the question - from my own personal experience - at the Notion Club Papers blog:

http://notionclubpapers.blogspot.co.uk/2016/11/how-do-tolkien-scholars-so-thoroughly.html