I can understand the impulse to talk about your ex-T's reputation, but professionalism is something your current T should have put first. No matter how compelled he felt to talk about your ex-T's reputation, this is not about him and his feelings and opinions about your ex-T, this is about your grief, the remaining attachment or whatever else you needed to talk about. That being said, if your current T feels so strongly about your ex-T's reputation that it becomes an obstacle for him to leave the space open for your emotions to be explored, then he should refer you out and not force himself to deal with something he is not capable of dealing or so it looks like.