Trinity has been a Christian belief for two millenia. It's nothing new
That does not mean that it is correct and true. It's the most contradictory doctrine I know of. Like pre-trib, there are sinister reasons why 'trinitarians' - especially the high-powered ones like MacArthur, etc. won't come clean about it. Many of them know it IS bogus!
The issue with Pre-trib and Trinity is more than the doctrine itself, it's about upholding the reputation of thousands of highly respected theologians. Over the last 1,600 years the number of books, articles, and sermons taught and preached on Trinity by highly respected and educated Theologians supporting it is in the millions! Pre-trib - same thing since Darby.
Diehard Trinitarians have been in damage control since the doctrine's development. They've "Closed the Crash Doors" by shunning and shaming people. JW'S are accused by some Protestants of being a cult for disfellowshipping people and rejecting Trinity. Trinitarians are doing the same thing to non-Trinitarians. It's hypocritical.
E.W Bullinger and T.D. Jakes are perfect examples. Trinitarians did everything they could to destroy their character and reputation after they came OUT of the Trinitarian closet. They did everything they could to destroy them. They didn't want a televangelist exposing their Trinitarian foolishness. So, Jakes conceded because he knew that if he didn't the badmouthing would continue, and his reputation destroyed. The cash cow gone.
E.W. Bullinger was the secretary of the Trinitarian Society. On his death bed he revealed his rejection of trinity. He knew that had he disclosed his rejection of Trinity beforehand; his works would never have been published.
Very few big shots like MacArthur and the like admit making mistakes. Christians have trouble admitting mistakes and usually their mistakes are acquired from listening to these 'big shots'. If the 'big shots' were to admit Trinity is ONE BIG MISTAKE, that would destroy the authority, legitimacy and reputation’ of thousands of well-respected influential Trinitarian authors!
The crux of the Trinitarian matter basically revolves around the nonsense of a hypostatic Union - AKA the two natures. That's really the only answer Trinitarians have.
In the 20 or so years I've debated this, NOT ONE person has ever proved the Hypostatic Union!
Literal six-day creationism is yet another line of gullible foolishness. Just think - this is what MacArthur teaches. God created the universe in 6 literal 24-hour days. Noah's flood was global. Noah put the dinosaurs on the ark along with every animal on earth! Then he teaches that God will destroy the entire universe at the end of the Millennium.
These things - Trinity - Pre-trib - and literal 6-day creationism, drive good people OUT of Christianity and people looking in want nothing to do with us. There's no more common sense in Christianity and too much hypocrisy and judgmentalism.