This isn't fact, friend...it's perception.
We perceive that judgement is being passed, maybe it is, but we inflate it in our own mind to the unth degree.
People put out what they feel about themselves; their words reflect their self-truth. I agree with Tink - your mother is struggling with her own addiction so displacing it onto another person gives the illusion of the removal of guilt and shame.

The stigma of BPD is also coming into play here. People assume that those who suffer from BPD are all lumped into the same pigeonhole. We are generalized and vilified...which doesn't help our 'victim stance'.
If a BPD is seen in literature or the media in a negative light, we're automatically that person...it's how people work, they categorize and generalize. If one BPD is manipulative, provacative and destructive, we all are. The judgement could be a reflection of the stigma and not of you.

I've also found that my best 'teachers' have been my harshest critics...it's not a pleasant way to learn, but it is a way to learn nonetheless. I think we can get to a place where we can detach from the judgements of others and validate ourselves. At that point the judgements wont bother us. That takes a lot of work...

I completely understand where you're coming from and have been there myself enough times. Best wishes friend.