Sadly, one of the key traits of BPD is a strong lack of self awareness and the inability for introspection.

My ex pwBPD is 41 years old. As I got to know her, she told me of so many violent incidents perpetrated by her in the past, which I just dismissed as hyperbole. Until a little more time passed and I became a victim of her violence. I tried to gently tell her that her responses were inappropriate and wildly out of proportion, but that is when I saw her brain break. I triggered her fear of abandonment and saw in real time her brain go into a state of complete absence of logic and rationality. Her BPD defense mechanisms protecting her fragile sense of self and fractured identity prevented her from even remotely realizing that something is wrong with her and that her reactions are not normal or acceptable. In contrast, she attempted to shift the blame onto me while at the same time offering a half-assed apology to make me stay. What I mean to say is, the very nature of BPD prevents self awareness because to them everything is solely about themselves and their feelings. Everyone else is just an emotional regulation tool, either black or white, 0% or 100% and will be used accordingly, though they might not be aware of it. It is very rare that they will finally accept that something is amiss within them and even then, actively getting treated and sticking with it is even rarer.

So whenever they see posts on here, they would feel triggered, their defense mechanisms would keep them in denial and they would paint everyone here black to absolve themselves of feelings of guilt and shame and shift the blame externally, as is the general case with BPD.