The problem with the Christian religion is that it tends to institutionalise, literalise and concretise what is meant to be a metaphor. The whole bible can be seen as an allegory, being a collection of myths. The Christ principle revolves around Jesus Christ as a metaphor.
The moment people literalise Jesus Christ, they idolise him and become attached to their idol. They get emotional and sentimental about their idol. This may appear harmless at first, but this religious mindset may create divisions among people because as long as religion makes Jesus an exclusive historical figure, there will always be an “us versus them” mentality, which revolves around the false dichotomy of “Christians” and “non-Christians”.
But in reality, there is no “us” or “them”. Christ as a metaphor unites us all as one. Christ can be seen as a representative of humankind. We are the Christ, and we are the begotten Son of God. As Christ is, so are we in this world.
Trying to institutionalise God only results in turning religion into a mental institution. People can go crazy when they think god is mad at them or they think they must fight and kill in the name of god.
There are other metaphors similar to Christ principle, such as Tao, Buddha, Krishna, and Great Spirit. Each is a finger pointing to the moon. Each can be the way to lead us to the universal truth of our oneness with God or higher self, and oneness with one another.