Tolkien may have said that, but it is difficult to find much convincing similarity between his world and Christianity - even less so between the LotR trilogy specifically and Christianity. Most of the the Wikipedia article is a real reach. Some of it would even be contradictory: for instance if Varda corresponds to the Virgin Mary, she would co-exist with Mary in the present age as a separate entity. Surely Elbereth is exactly what she is presented as: a female Vala, wedded to Manwë since before the creation of Arda.

And what are the Valar? In the mythos, they are sub-creators. In Christianity God alone is the creator: angels have no part in creation.

The article draws similarity between the resurrection of Jesus and of Gandalf: but in Christianity, Jesus is literally one of the three persons of God, while Gandalf is a Maia, one of the lesser Ainur.

There are a lot of parallels drawn in that article, and I will not go through every one, but as far as I can see they are all contrived. The closest parallel is that of the rebellion of Morgoth - but there is no real equivalent of Sauron in Christianity.

It is also worth thinking about one thing that is missing. The fall of Adam would have taken place long before most of the sections of the Silmarillion, and yet there is no hint of this foundational event.