The term "person" is an analogy only. It is meant to convey "personhood"--mind, will, etc., and so to keep the Father distinct from the Son and both distinct from the Holy Spirit.I agree, God is not a human being. But the wording of the 'trininty' does identify God as 'a person'. Which by definition is 'a human being'.
The Messiah was God incarnate, God in human flesh, truly God and truly man.Messiah was a human who put himself on the same level as God, no?