[She indeed has no idea. The Einzberns told her the bare minimum about the previous war, and Ilya didn't really care for the details except for the fact that Kiritsugu never came back. The other things are irrelevant.

Apparently not for him.]

Everyone will want to change what they don't like, and everyone's idea of good or bad is different. And the Grail in itself is not a good or a bad thing.

[Well, it was like that, once. Since the failure of the Third War, the Grail has held the manifestation of all the evils of the world... and it's up her to fix that.]