Again: I pointed out the difference between what actions happened before the player even participated in the story. Aszhara was 10.000 years before that. And the current nelf leadership are those who opposed Aszhara.. that little detail might have slipped your attention.
Yeah, for the Forsaken it might not be so severe a loss, since they can live in any sewer, the Undercity was nothing more than that. A world tree and almost the entire population of the faction capital of the night elves is only "slightly" harder harder to replace.
The night elves are very close 2nd to the humans in popularity, in some level ranges and geographics they are even the most popular race.
Yeah, I let myself be affected by emotion. And immersion. I don't see this as a weakness. But you do you.