Unfortunately, therapists are all qualified differently based on state or local requirements and thus don't necessarily receive the level of education and training that you would expect; and it sounds like your therapist may be lacking in part of their education or training.

They should not be trying to minimize what you went through, particularly if you are just opening up about it.

Have you told your therapist that this sort of attitude bothers you? Maybe being honest about how your therapist is making you feel would make the therapist realize they are not choosing the best route for therapy sessions?