Abstract, you are right and wrong ;) One can start with the behavioural stuff only when you are sure that your intellectual assessment of the person, the issues, the relationship etc are valid, correct, etc. It's when one doubts any of these, which is par for the course with attachment problems, and you can't trust your own judgement, and you look at the situation from multiple perspectives and you don't know which perspective is correct, that you run into trouble. Which is what happens to me. And this has to do with structural dissociation, where there are many personality parts, where one is totally naive and trusting, another is adult and rational and might sense a real threat, another totally frozen in fear, etc etc etc, and often you don't know which one is reacting, or which one to trust. So, I think there is not a 'one size fits all' approach with attachment. What works for you could not possibly work for me as we don't respond in the same manner to the same stimuli. And this is what trauma specialists are supposed to be able to deal with, but they can also make mistakes.
Throughout therapy with T4 I trusted her as a person and I trusted her judgement. When I started freaking out I was confused (as explained above) and I did not know whether my response was valid / sane / sensible or not. But we DO have a gut instinct we should trust. As I said earlier, we managed to sort it out, after therapy had been terminated due to finances, and in the last e-mail on the topic, the therapist said: 'I can see why my statement must have felt so devastatingly misattuned', which validated my response. As I said, we finally managed to sort it out, by which time it was too late. But just because we managed to sorted it out after about a month, it doesn't mean that the interim period was not highly confusing, upsetting, etc. And, it wasn't a 'problematic pattern', it was a valid response to what I perceived to have been a threat at that point in time.