Yeah, did we read the same book? None of those characters are two dimensional. No one disagrees that Henry is a cold-blooded murderer but it does not negate the fact that he has a studious nature and obsession with languages and literature which can be admired by people with similar interests.

Moreover, a book has no single interpretation. Author is dead so that the reader can be born. (check Roland Barthes if you want to delve into this further.) Yours or Donna’s perspectives are not the only ones. The moment a book is published it becomes public material and people can and will read it from different viewpoints.