[SlickWillard]

If absence of complete faith is equivalent to turning to the Shadow, most of us are in serious trouble!

And yet, Tolkien doesn't say

But Arwen became as a mortal woman, and yet it was not her lot to die until some small portion of that small gain was lost.

Instead, he very clearly states

But Arwen became as a mortal woman, and yet it was not her lot to die until all that she had gained was lost.

[Restorer]

I think you may be reading something into the text that Tolkien didn't intend. According to what I was reading last night, the "souls" of men and elves were different in kind. Elves were bound to Arda and would end permanently when the world did, whereas men left Arda when they died and went elsewhere, presumably to Eru (or God).

Although there are intimations of a far distant world in which "all things will be made new" and Men, Elves and Valar will be reunited forever with Eru. LOTS of Christian foreshadowing in these works.

When Arwen died, she died as either an elf or a human. Which do you think it is?

You are one tough cookie, if you can read Arwen's despair as black evil deserving of some eternal punishment. Remind me to stay on your good side.