Families don't allow family members to continue down a path that will lead to annihilation. Check out what Christ said to the seven churches in Revelation. Those that were in error were rather harshly warned.
An altruistic love between brethren would encourage fraternal correction. The parents though, have the right to speak to their children in ways intrinsic to their authority; when the children argue amongst themselves, does the parent not intervene and have the final say? Would he not encourage peace among his children?
God made each of us unique, like snowflakes. There are differences between us. Those differences can be discussed as people who love God: a common thread between us that supersedes our differences, and should permeate all our discussions.
I would like to see an ecumenical prayer thread, where we each praised God, thanked Him, declared our love for Him together. I tried recently. When I speak of unity among Christians, I don't believe that means that we must belong to one church, or any church, if one chooses. God works wonders every moment in His Creation. God worked in my life by saving my mother's life when she was terminally ill and sent home to die with her family. I was a baby then, but my Mom and my Dad and I never forgot that God had given us a miracle! I believe that each of us here has a story to tell of how God helped them through a difficult time. We all have so much to be grateful for, even in these difficult times, as it is God Who sustains us.
May He bless you always, and give you His peace!