I tend to say I've 'forgiven' the JWs who cut me off, but as far as our friendships go, the forgiveness is pretty meaningless without their 'repentance'. That is, unless they recognise their treatment of me as wrong and take steps to reach out to me, they can never receive my forgiveness, but I am certainly open to this reconciliation should they ever want it.
Of course this is a much more extreme case, and I'm not going to speak on behalf of the families. I think letting go of anger and the need to exact vengeance are good things, but you can't have reconciliation with someone who wants to murder you, no matter how open you are to the possibility.