This verse comes in a part of scripture calling for unity in the church. Not just a group of people that attend a service in the same place at the same time, but the whole church, all of Christ’s followers. That includes my children, I think. either I baptized them at birth so they are officially members of the body of Christ, or they are unbaptized, relying on God’s grace. Either way, I suppose I count them as part of the fellowship of believers. And even if they weren’t, this still sounds like behavior I should apply to everyone.
One of my main goals is to raise my kids to be Christians. Fellow believers. Complete humility, gentleness, and patience is crucial to that mission.