The suffragists were making wonderful progress with gaining womens rights. The terrorism of the suffragettes made public favour move away from the suffragists and delayed any progress at best.
The story of Eru and the fall of Melkior is interesting in that it blends the Christian creation myth with that of pagan religions - take for example the fact that each ainur has his own "domain". This is in fact typical of the genre of fairy stories or myth, which is what Tolkien was trying to mirror. If anything, the creation story is the one that has the most allegory and even Tolkien would find it hard to deny that. But applying the same to LOTR is harder - the people who could be allegories of Jesus couod be multitude (Gandalf, Frodo, Aragorn). People like to see allegories in things and that is great, no one can tell you you are reading something wrong, and if that is how you get more meaning out of a book, then good for you.
I recently went to a Tolkien expert's lecture (author of the latest biography https://www.amazon.co.uk/Tolkien-Raymond-Edwards/dp/07198098... ). He was very adamant that Tolkien didn't like allegories and instead filled his books with his moral values in a more subtle way. It is easy for us to project our own allegories on someone else's books, but anything you may see in LOTR was only made for good storytelling and not with an intention of allegory.