And another reason why the JWs are wrong teaching that the Word is just a created angel who became a man and reverted to being an angel.
This “kingship” or throne of power and authority lasts forever and ever:
[B]ut as to the Son, “Your throne, O God,
is forever and ever…, (Hebrews 1:8 Green’s Literal Translation)
Daniel 7:14, which the Jehovah's Witnesses cite in support of Christ’s kingship and dominion, or rule and authority, also makes it very clear that it lasts forever and shall never be destroyed:
His dominion is an everlasting dominion which shall not pass away, and his kingdom that which shall not be destroyed. (Green’s Literal Translation)
But even the Jehovah's Witnesses don’t believe that. Their version of Jesus Christ, the angel, has a very limited, narrow role to play in salvation history and for all practical purposes He is dispensed with after the millennial reign. He is not regarded by them as the eternal king of an eternal kingdom, but reverts back to being an angel on the sidelines. They write:
Since sin and death are to be completely removed from earth’s inhabitants, this also brings to an end the need for Jesus’ serving as “a helper with the Father” in the sense of providing propitiation for the sins of imperfect humans. (1Jo 2:1, 2) That brings mankind back to the original status enjoyed when the perfect man Adam was in Eden. Adam, while perfect, needed no one to stand between him and God to make propitiation. So, too, at the termination of Jesus’ Thousand Year Reign rule, earth’s inhabitants will be both in position and under responsibility to answer for their course of action before Jehovah God as the Supreme Judge, without recourse to anyone as legal intermediary, or helper. (Insight, 170)
When God … raised Jesus Christ from the dead to spirit life in heaven … the heavenly Jerusalem received him into the midst of her organization of angelic sons in heaven, but as the Chief One among them, in the position of Archangel. (M. Alfs, Concepts of Father, Son and Holy Spirit [Minneapolis, Minnesota, Old Theology Book House, 1984], 71 n. 152) (Concepts)
The Jehovah's Witnesses should probably take a closer look at Hebrews 7:25: “Consequently He is able for all time to save those who draw near to God through Him, since He always lives to make intercession for them” RSV). This refers to the “intercession of the exalted Jesus, not the sequel to His completed sacrifice but His eternal presence in heaven, cf. Romans 8:34 (NAB notes Hebrews 7,25).
http://144000.110mb.com/trinity/index-7.html#34