The Jesus Seminar's pursuit of the actual sayings of Jesus is a good case in point. Liberal scholars vote on which words and events are real to the life of Jesus and which are purely mythological. Much of the gospels, including the entire gospel of John are rejected as historical. The bible becomes the book that represents the Jewish and Christian communities' quest for God not the divine revelation from God. This deconstruction of scripture carries over into the life of Christ.
Liberals reject the virgin birth, substitutionary atonement, and the physical resurrection.
It is no wonder liberals do not see Christ's divinity in terms of being the same substance with God but rather, spiritual unity with God. I am reluctant to say who is or is not a Christian, being a Christian is certainly more than having proper doctrine. I think there are people who are in relationship with Christ even when their doctrine is inadequate. However, I am prepared to say that liberal doctrine, as I understand it, is no longer Christian. The divine relationship between the Father and the Son cannot be rejected.