Romans 12:10 Be devoted to one another in love. Honour one another above yourselves.
When we get to know Jesus and place our trust in Him, we are said to be born into His family and gain a whole mass of brothers and sisters.
We do not choose these brothers and sisters. We do not choose who we have and who we can ignore. God has chosen us first of all and we are family.
If we are to act like a family then we ought to love each other and to prefer each other over those who choose not to be part of God’s family.
We should not turn our backs on others, but treat ALL Christians well!