Only you can decide if it is in your best interest to sever the relationship with your daughter. Nobody likes family conflicts because they put an enormous strain on many members in the family. You can lessen your contact with your daughter if that makes you feel better...just checking in on her with telephone calls though not lengthy and rare personal visits if that can be tolerated by both sides. To assist you in deciding what to do, make a list of all of the positive reasons to cease contact with your daughter and all of the negative reasons and then weigh the two options.
Our daughter has been so brain-washed by her husband that she will always follow his train of thought and deed. Over this particular conflict my daughter has always maintained that we should not lose contact with the little 6 yr old (don't 'punish" her - as if punishment is our style) but then they have gone on to use the little 6 year old to ask us questions we cannot answer, leading again to confrontation : "I want my sister's telephone number', (they obtained it via a P.I. and the phone call to her was rebuked - the estranged daughter has a tremendous fear of her father) "why cant I talk to my sister," "where is Mary's (her aunt) birthday present" (they also had an altercation with her so she does not feel welcome in their home anymore) So we even question the sincerity of us keeping contact with our young grand-daughter. And indeed the effect on her of an in-conflict families ! The two logical options open to us weigh heavily towards the negatives mostly represented in our son-in-law who has an enormous capacity for conflict, hate and revenge - as illustrated by him writing off his own mother. As much as it pains us we will most probably break contact - the alternative is to maintain contact and just have the heap of hate and conflict accumulate to that point anyway. Txs for your reply.