@shortstories For starters: He clearly don't have any training or real knowledge on the topic.
He failed to understand which BPD was discussed. He said Bi-Polar Disorder, but the BPD he talked about was Borderline Personality Disorder. Bipolar is usually medicated and usually predictable. Borderline isn't. Borderline is a personality disorder and requires CBT (cognitiv behaviour therapy), aka re-education. Although it's also a retired diagnosis now. They usually replace it with CPTSD.