No, I identified the problem... the pride of man. The scripture is there as a guide to how Unity of the Spirit works. Unity comes with Spiritual maturity, part of that maturity is being man enough to listen to others and hear their views and not beat them down because they disagree with you.
There are simple solutions to the biggest divides in the church which I and others have presented on the forum, most are just not ready to receive them.
How does someone learn humility? I'll admit, I really had to become completely hopeless in my own eyes to really let go of pride, which is a word we use to describe the feeling of "self effort".
Pride, disunity, division and strife all come from the flesh, are the works of the flesh. Unity and love and gentleness and patience are from the Spirit, and in the Spirit we are one. If we walk in the Spirit, we will exhibit the Spirit's fruit in us which will lead us to know unity with others.
I think we can truly establish the unity the Bible speaks of even if we don't agree in all doctrine. That we are trusting Jesus to save us from our sins, that we have the hope of the resurrection, because Jesus raised from the dead, you know, the basic tenets of our faith. This is our unity. Whenever we may feel disunity, we establish it again being in Christ.
Love, that is, the dedication towards someone's wellbeing, gentleness, patience, all of these, when we have that humility to not just act of ourselves, posts that promote strife, when we write to each other in love, then we start from the position of unity, and seek to unify on other points.
When we start from the position of disunity, where we disagree, then the focus is on that division.
I think it's that "pride of man" that seeks after the division, what separates, without the solid foundation of what unifies.
Much love!