Is
Ilúvatar supposed to be kind? Other similar questions: Is Ilúvatar supposed to be just? Is He supposed to be true? (meaning -- not contradicting himself) Or, in an all-encompassing question, is Ilúvatar supposed to be good?
Now, this last question is not as simple as it sounds, since it really encompasses the others. A Good
God must be loving, just, true. But if we try to define Good, we reach a dead end. What is Good? I recommend a very interesting book dealing with this question, "Principia Ethica" by G.E. Moore.
But in the end (as I see it) Good must be defined by God, and not the contrary. I mean, Good is Good because it is the will of God (and the will of God
is God, it is part of his essence), rather than God being Good because he was following some higher power -- as we ourselves do when we perceive Good. Good is what God
is, and the Goodness of other things is derived from God.
There is a hazy flavor to the word "kind". I use it mostly as "compassionate", meaning "wanting to relieve from pain". But what if pain is the lesser
evil? Which one would God choose? Surely, pain. If you ask why is there any pain in the world, God answers, "because you abandoned me". And if you ask why did he allow that, he answers, "because free will is a greater good than the absence of pain".
I agreed with that way before I became a Christian. Free will is really the possibility of Good, and not only the possibility of Evil as some seem to assume. Pain is overrated as an evil. To be, to exist, is worth the pain. Imagine unfallen Adam in Eden, as a branch broke, fell upon his head, and hurt him (for branches broke in Eden, I suppose). Would he get mad at God because he was in pain? I think his pain would be another reason to thank God for having a head in which to feel pain, a free gift from God. Much better than not being and not having pain.
This is the main difference between Buddhism and Christianity. In a a-theistic Universe such as postulated by Buddhism (sure, there are gods, but no GOD) the goal is non-existence, to escape pain and suffering, which are seen as the greatest evil. In a theistic Universe such as
Tolkien's creation Being is worth the pain -- it is the greater good, and the greater evil is noncompliance with God. This is one of the main philosophical assertions of Christianity: Being is Good, for it allows the greatest good to come true: communion with God. This is worth the pain.