For starters, here are reasons why I do:
1) It presents an invalid soteriology, as its Jesus did not offer what Adam lost. Adam lost perfect life on earth. The Trinitarian man-god Jesus did not offer a corresponding ransom for that. (2 Tim. 2:5, 6) It also states that Jesus did not really die, as his "divine nature did not die," only his "properties of divinity" with his human body died.[1] Thus, Trinitarianism teaches that Jesus did not have to fully sacrifice his life. Regarding this, consider the conversation Jesus had with Peter recorded at Matthew 16:21-23 and at Mark 8:31-33. Here, Jesus made it very clear that he would be killed. But Peter rebuked him, saying: "God forbid it, Lord! This shall never happen to You." (Mat. 16:22, NASB) Here, Trinitarianism appears to agree with Peter's rebuke. But Jesus called such reasoning satanic, and thoughts of men alienated from God.
2) It violates the laws of physics that the Bible agrees with: the Trinitarian Jesus is "fully man" in the divine realm. "Jesus continues to be fully God and fully human—now God in glorified human flesh."[2] Yet, Jesus said that he is not from our world, that he comes from a transcendent realm (TWN ANW), a realm "above" our "lower" realm (TWN KATW) where our physical bodies cannot enter. (John 8:21, 23) Additionally, there is Jesus' contrast at Matthew 16:17, where he contrasts "flesh and blood" with his "Father who is in the heavens," and 1 Corinthians 15:50, where Paul said that "flesh and blood cannot inherit God's kingdom, neither does corruption inherit incorruption." "Flesh and blood" is human nature, and it can only exist on earth or in earthly conditions. Thus, Trinitarianism is at odds with the laws of physics and contradicts Jesus and Paul. It makes Jesus into a fool for retaining his physical, human body and taking it to a place where he said it by definition cannot exist.
3) It turns Jesus' divinity into an abstraction. He is the second person of the Godhead, yet he is also "fully human" in the divine realm where Jesus and Paul said human flesh cannot exist, harmonizing with the laws of physics. Indeed, by way of contrast, Jehovah's Witnesses affirm and openly declare Jesus' divinity and lordship to the glory of God the Father. (Phil. 2:11) It's that simple.
[1] Slick, Matt. "The Trinity, the Hypostatic Union, and the Communicatio Idiomatum."
http://carm.org/christianity/christian-d…
[2] "The Dual Nature of Jesus Christ." http://www.gci.org/Jesus/dualnature
Edit: That should be 1 Tim. 2:5, 6, not 2 Tim., that discusses Jesus' corresponding ransom: ANTILUTRON.
@ surfari, hi there! You said: "the answer to every question on jw beliefs can ultimately be traced to "the watchtower said so"." Actually, perhaps you noticed that I did not quote the Watchtower, rather, I quoted from Trinitarians. The Watchtower has nothing to do with it. They just agree with me that the Trinity makes Jesus a liar and poor teacher. I honestly don't think you know what the Watchtower teaches, based on your post. The Watchtower is more scriptural and logical than you think. You're welcome for learning a new word! Take care! :-)
@ Tim F, Hi there! That word [ANTILUTRON] does mean that literally, I looked it up from non-JW sources. Adam was a perfect man and lost perfect human life. Jesus was a perfect man, and sacrificed his perfect life. Origins are irrelevant. [He was claiming that Adam would have to have had a pre-human existence as an archangel too.] It’s the values that are most relevant. But it’s the Trinity teaching that I referred to that means Jesus did not sacrifice his life, thus unwittingly denying the ransom.
Link
(This question was deleted when Trinitarians complained about it. However, a more comprehensive version of it is here: jimspace3000.blogspot.com/2010/11/do-you-reject-trinitarianism.html)
(This question was deleted when Trinitarians complained about it. However, a more comprehensive version of it is here: jimspace3000.blogspot.com/2010/11/do-you-reject-trinitarianism.html)