Undisfellowshiped,
You wrote:
Trinitarians say that the Shepherd of Zechariah 13:7 is "God" because Psalm 45:6, as well as the New Testament, says He is God.
That is not true. You have been arguing that Jesus is God in Zechariah 13:7 because he is called God's "companion" or "associate." Don't try to change your story.
Additionally, there are several Trinitarian commentaries that try to do the same thing you have done. They try to show that "companion" means "equal." As I've shown, it does not mean equal. There are only ten uses of the Hebrew word in the entire Bible, and that word is not used for any special relationship such as for a wife or very close friend. It simply means, so to speak, "that guy that lives down the street or next door." He is not someone special but merely an acquaintance. This is where you and I differ. You trust any Trinitarian commentary that comes along. I believe you trust them more than you trust the Bible itself. I am almost certain that is the reason you accept the Trinity doctrine, a doctrine that was not believed in throughout the entire Bible period. It was a doctrine brought into the so-called Christian church long after the apostles had died. It is a doctrine warned against in 1 John 4:1-3:
My dear friends, do not believe all who claim to have the Spirit, but test them to find out if the spirit they have comes from God. For many false prophets have gone out everywhere. This is how you will be able to know whether it is God's Spirit: anyone who acknowledges that Jesus Christ came as a human being has the Spirit who comes from God. But anyone who denies this about Jesus does not have the Spirit from God. The spirit that he has is from the Enemy of Christ; you heard that it would come, and now it is here in the world already.
The teaching of the Trinity is the teaching of the Antichrist, the great Enemy of Christ. The Trinity doctrine teaches that Jesus came as "God" or as the "God-Man," not as a bona fide human being. Your mind has been conditioned to believe that the Trinity doctrine is taught in the Bible, but I view that as brainwashing just the same as I view the JW religion as brainwashing. And it is just as dangerous.
Frank