I work in mental health so I hear how the professional discuss it. They just use the term 'pd' but every patient/service user they talk about has a bpd diagnosis specifically.

Theyll say things like, "oh no not another pd", "I can see the pd in this person, they're so manipulative", "don't trust anyone with pd, they'll do literally anything they can to manipulate you".

I understand not everyone is the same, and there might be people who have been given a bpd diagnosis who are very manipulative or who lie and I have seen that, but it's not something that should be assumed about every single person with the diagnosis.

Im in a much better place now, but in my own experience, what couldn't been seen as manipulation from me was when I felt like someone's action towards me suggested they didn't love me and I'd say things like, "but if you love me that wouldn't have done that, that doesn't make sense" - in reality, the action they did probably could have existed at the same time as them loving me, I just couldn't understand that at the time. That wasn't really manipulation, there was no lieing, no bad intention... In my own experience most my mental illness was internalised, I hated myself with every fibre of my being and couldn't not believe that I was worth anything, so hearing all these professionals around me talking as if people with bpd are all scheming people who can't be trusted hurts. 

 It feels hurtful to hear these professionals talking about the diagnosis in the way they do. To fit the diagnosis there is a long list of criteria, and people don't have to fit all to receive the diagnosis.