'Evil incarnate' was probably overstating the matter :-) But I think we were supposed to see him as the villain, and that was the issue (or one of the issues) this reviewer was responding to.

ETA: I'll rephrase that. Forget what we were supposed to think. I think most people saw him as the villain. He was cold and ruthless and easy to believe he killed off an entire family. He was shown to have good reasons, but he was never shown to be a good human being.