The problem is we are not talking about an intellectual disagreement.
As you might have guessed, I had this issue with my parents after I left the nest.
I told them my boundaries, and said do not cross them.
They crossed them, and I was done with them—forever.
I have a sister who forgave them and prayed for them and visited them and then faced emotional abuse over and over and over again.
Her call—but I will have none of it.
When people say they own you, believe it and run!
The bf section above describes where you and I would both disagree with the path she took.
Being a Christian does not require, or permit, being an enabling doormat. It's a lack of trust in God to cling to wackos and not to require proper respect for your person or for your duties to your own family.
All you can do with abusers is be kind and firm and tell them you'll pray for them (and really pray for them) and then get out of range. If they figure out they've been crazy because you're not available to abuse, sometimes they change. It's a miracle. But it does happen. And only if we do our part.
Sounds to me as if we ultimately agree.