Not so strange. You know that the opposite of love is not anger, but indifference. As long as he's so involved with being mad at her, or getting sucked into her drama, you know he's still feeling emotional attachment to her. And the fact that she's a total slutty whack job has to make you question his judgment at this point!
I mean - it would be one thing to make a brief mistake with a woman like this, then finally come to his senses and realize what she really is. But to KNOW what she is and still allow himself to get sucked into this? You're right, it's really disrespectful to your relationship with him.
