Well, at least you prove you've earned your screen name here. The Jews used the Hebrew plural name Adonai to refer to God, as synonymous with Jehovah. Its used some 431 times that way in the Tanakh. The technical term is "semantic domain," viz., that a word can mean many different things. Yes, it could refer to a woman's husband, but it also could refer to Deity. Context helps us determine which is which. Word translations are not just one-to-one.
You forget that grand-daddy of all Trinitarian texts, John 1.
1 ¶ In the beginning was the Word, and the Word was with God, and the Word was God.It doesn't get any simpler than that. The Logos existed with God uncreated, and indeed it was God. That Logos became flesh and lived among men. I fail to see any other conclusion than Jesus Christ was God and was man.
2 He was in the beginning with God.
3 All things came into being through Him, and apart from Him nothing came into being that has come into being....
14 And the Word became flesh, and dwelt among us, and we saw His glory, glory as of the only begotten from the Father, full of grace and truth.
- John 1:1-3, 14
You accuse Christians of being polytheists; that is a gross misrepresentation of Christianity. It's no different than the accusation that Jehovah is a cruel, vidictively petty fiend in the Tanakh -- both rely upon an understanding of reality unsuitable for all but the most unquestioning of children, and makes that the focus of one's attack. The Trinity, in short, is this, and nothing more: there is one God in all of heaven and Earth. The Father is God. The Son is God. The Holy Spirit is God. Its simple, yet profoundly mysterious.
Its simple, yet profoundly mysterious.
Always comes down to this when you can't explain satisfactorily. "Its a mystery". What's simple is that its eject from the argument crap.