I really hate when people claim they have to interact with those with BPD as if they were children. 

News flash to those this pertains to: 
Your inability to display patience and understanding without equating us to little children is a *you* problem. Your condensation is likely to make things worse if your BPD friends, partners and relatives realize what you're doing. 

Infantalizing a grown, high-functioning adult is a common abelist move. No therapist worth their salt would condone this line of thinking. You don't help someone by talking down to them.

We are not children. We are often traumatized and distressed by our circumstances, but adults are adults. Your abusers do not define us. And to those that diagnose their abusers to with BPD (or any other personality disorder) without any professional background to even do so, a big, resounding fuuuuuuuck you.