It is a popular and almost unquestioned truism of modern spirituality that everything is one. We are all connected, all brothers and sisters in the great family of humanity with a deep unity that ultimately overrides all other considerations. I went along with this idea myself once because it seems true in an underlying spiritual sense. After all, there's only one God, one Creator. I had reservations but took it as broadly true.
But what if it's not true or, at least, not as true as it is taken to be? To begin with, from a Christian perspective we are all one in Christ but for that to be the case we have to accept Christ. We are not all one outside Christ and even if you extend this to a more universal plane to mean we are all one in God then we surely still have to accept the reality and truth and meaning and fact of God? We have to respond to God within us and do so on a spiritual rather than mere intellectual or emotional plane. Only then can we meet in a real unity.
Then there are good grounds for thinking that the present time is not one of unity but of separation, of dividing the sheep from the goats. Jesus said he did not come to bring peace (unity) but a sword (division). This is often ignored by those who wish to paint a picture of a false Jesus who loves humanity in its fallen state more than he loves God. Of course, Jesus does love humanity but he does not love the fallen state and he wants to redeem us from that state and bring us to the reality of God. But for that to happen we must repent our evil nature. Yes, our evil nature. We cannot continue in the worldly path and expect God's love to operate regardless. God may love all human beings but above all he loves truth and he loves those more who reflect his own truth back to him.
The modern world demands that we accept everyone on their own terms. We are all one regardless of what we are. Essentially, this puts quantity above quality. It is totally at odds with the true spiritual attitude which reverses that hierarchy and sees that what you are is much more important than the basic fact that you are. Spiritual unity can only come about at higher level and to know this unity you have to fit yourself for that level which means respond to spirit. The material world is not the world of unity but of separation and to force unity onto it on its own level is to create a lie. No wonder that agenda is being pushed so hard in this day and age when spiritual truth is being parodied and reinterpreted in material terms to deflect us from the hard (for the ego) facts of reality.
There is another point to take into consideration on this matter of oneness. Evolution is a growing out from sameness to difference. We become more individual as we evolve not less. Insects are a lower form of life than animals, and the higher animals show more individuality than the lower ones. Then when you get to the human kingdom you have real individuals. This no doubt continues. The glory of the saints is that they are so individual, all one in God but fully themselves too. And there is no one in the history of humanity more individual than Christ which is partly why the force of his personality persists through the centuries. He is not a cardboard cut-out saviour but a wholly unique person, as we all are and we will become more so as we progress into the heart of God. That journey brings out our uniqueness. It does not obliterate it in some faceless, tasteless spiritual porridge. The very fact of love proves this. You can't have love in oneness, not real love of the sort that lays down its life for its friends. Love needs separation. Love is the denial of oneness.