In my experience, it seems the default position of many Christians towards their siblings in Christ is one of distrust.
Often, there are good reasons for this.
Other times, it’s really about a lack of faith in the power and provision of God in Christ–by the Spirit–to see us through relational risk and disagreement.
Either way, God calls his people toward a kind of Spirit-powered love that results in well-founded mutual confidence over and against underlying, anxious suspicion.
It is not so much about simply trusting people more per se, but rather a deeper entrusting of ourselves and our Christian family to Christ, so that confidence is built on the demonstrated desire for one another to have–above all–greater communion with Christ, in the non-violent, non-coercive, truthful-yet-graceful way of Christ.