Is the trinity a devilish Babylonian counterfeit (as many Messanics claim) or is it the only true doctrine of the Godhead (as Protestants, Catholics and Eastern Orthodox claim)?
As far as I am concerned, the Trinity doctrine is just a speculation that includes ideas from both the Bible and outside pagan philosophical sources. It's a possible interpretation but, in my view, goes far beyond what the Scriptures teach. My only concern is that the deity of Yah'shua (Jesus) is accepted for without that truth you have no Gospel and no salvation. How you fit that into the wider equation of the Godhead is a matter of personal conscience.
Because the biblical equation on this is incomplete, we are never all going to agree, so why argue about it? The historical witness of the Godhead controversies over the centuries is enough to convince me that the devil has had a field day setting believers up against one another, even to the point of killing them, which hardly seems a fruit of the Ruach haQodesh (Holy Spirit) to me. There are more important things to argue about.
My own view (take it or leave it) is that the Godhead consists of the Father (Yahweh), the Son (Yah'shua) and the Holy Spirit (the Ruach haQodesh) on its simplest level of understanding, that they are all one, and that they are all God (Elohim). I believe that the Son is subordinate to the Father even though He is jurisdictionally equal to Him, but only because of Yahweh's appointment. I also believe the RuachQodesh is a Person (many Messianics, like the Jehovah's Witnesses, believe it is just a force) - seven Persons, to be exact (Rev.4:1; 3:1; 4:5; 5:6), making a total of nine persons in the Godhead. And if that isn't enough, I also believe the Ruach haQodesh (Holy Spirit) is female. But I won't lose any sleep if you don't agree with me and I certainly won't cry "heretic". And hopefully you would accord the same respect to me. If you would like to know why I believe this, see the series on the Godhead called, The Trinity, and also the excellent summary, Yah'shua the Messiah (Jesus Christ) and His Place in the Godhead. Whatever the truth may be, it doesn't change how we experience the Ruach (Spirit) in our lives, and that's what counts.
I have no time for Messianic and Trinitarian Godhead inquisitors. Since the Bible is not obviously clear about the issue, let's just remain undogmatic and give believers the freedom to arrive at their own conclusions.