Well, I believe in ONENESS per se... but there are some things that aren't completely clear to me.
For example.... how do you explain this verse? (there obviously is shown to be a difference between God, and Jesus).
Romans 8:17 "And if children, then heirs; heirs of God, and joint-heirs with Christ; if so be that we suffer with him, that we may also be glorified together."
So, how is it that we are heirs of God, and joint-heirs with Jesus? This would suggest a distinct difference between God and Jesus.
We must be very careful when we depict the humanity of Jesus, because many people take this to mean that we are co-equal with Jesus, and I think this is where the Mormons took their spin-off. They believe they can become equals with Jesus, and can become like him, like gods themselves.
Just one of the questions about the "oneness" that I've not understood, although I do believe that there is only one God and that in Jesus was manifested the spirit of the Father. It is just that sometimes the descriptions written by Paul about the godhead conjure up other things.