Except I am getting called out as sinning and no repenting, when I am using what I think are healthy tools for a pwBPD AND following Biblical guidance.
For instance, me retiring to the room while wife ranted and stomped around the house was me being selfish and thinking about myself... .apparently.
This is where I suggested you "manage" the BC a bit.
He is focusing on stuff that you are doing, pushing you to act in directions against what we are saying here, what the P is saying, and what you believe.
Your goal: Stop the BC from directing you that direction.
Not your goal: Educate the BC on why this is a bad idea, or convince him it is a bad idea.
Ways to accomplish the important goal... .
1. Have a scriptural/theological debate with the BC over the topic.
Doing this will undermine either your authority with your wife (bad) or his authority with your wife (also bad, but not quite as bad). Avoid it if you can.
2. See if he forgets about it.
(Sounds ideal if it works, but may not work)
3. Try to re-direct him toward something more timely/relevant.
This will be a subtle one to do properly. Perhaps your P can advise you?
4. ?