Hi js friend,
I can understand why you are having a hard time with this behavior. First he had no time for your children and now he seems to be ignoring his grandchildren. I can imagine that seeing him behave this way might also bring back memories of how he treated your children in the past.
So i was wondering if this Is this normal behaviour for udBPDex's to behave this way towards their grandkids?
and could it be due to object consistency?
It can be difficult to understand why people with BPD act the way they do. What I can say is that past behavior often is a good predictor of future behavior. The reason he didn't make time for your children might also explain why he seems so indifferent when it comes to his grandchildren. Did he ever give you an explanation for why he didn't make time for his children?