It sounds to me like people were trying to draw parallels between what he wrote and what was going on in the world politically.
I have just found a long spiel about the immortality of Elves and mortality of Men and the will of Illuvatar and the "Christian mythology" as he calls it and the Fall of Man. It's Letter #212...a draft that was never sent. It's kind of long and deep (and right now I'm watching the race that was postponed from last night). I'd like to wait until I'm a little less distracted to digest it all!