As a therapist treating survivors of sexual abuse, this article was very informative for me. Therapists can be very nervous about treating clients who have been diagnosed with Borderline Personality Disorder, especially if they are described and identified with that label. Viewing these clients as trauma survivors enables therapists to reframe their own countertransference reactions and possibly see the clients in a different light, as you so elequently pointed out.
However, as the article concluded it appeared as though you might have been referencing a client with Dissociative Identity Disorder (Colette in your article). It is difficult to tell given the brief summary of your interactions. I found that internal family systems therapy is very effective in treating DID and am interested in learning more about it.
In any event, all trauma therapists can benefit from helping clients speak to their inner "parts" which may have opposing messages at first glance.
Thank you for the informative article!