God is not three; nor is He three-in-one yet still one, that idea originates from paganism. More specifically it originated from Babel, before God confused the language of man and caused every person to disperse into the world.
That is why every single religion on the planet is virtually identical, only the names of the gods are different.
The Trinity represents the three phases of the sun at it's rise/birth, at it's zenith at midday, and finally it's death at sunset; yet it being the same sun at all phases.
The Trinity god is not actually supported by Scripture unless you twist it, and the Jews were non-trinitarian so there is no logical reason for Christians to be trinitarian. It was introduced into the church four centuries after the crucifixion by mere men, who were steeped in Gnosticism and in Greek philosophy.
“The Alexandria catechetical school, which revered Clement of Alexandria and Origen, the greatest theologian of the Greek Church, as its heads, applied the allegorical method to the explanation of Scripture. Its thought was influenced by Plato: its strong point was [pagan] theological speculations. Athanasius and the three Cappadocians [the men whose Trinitarian views were adopted by the Catholic Church at the Councils of Nicaea and Constantinople] had been included among its members.†— (Hubert Jedin, Ecumenical Councils of the Catholic Church: an Historical Outline, 1960, p. 28)
The Bible actually defines Antichrist as anyone who denies that there is a literal Father and Son, and that Jesus is the literal Word of God made flesh.
“Who is a liar but he that denieth that Jesus is the Christ? He is antichrist, that denieth the Father and the Son. Whosoever denieth the Son, the same hath not the Father: but he that acknowledgeth the Son hath the Father also.†1 John 2:22-23
So the doctrine of the Trinity itself is Antichrist because it denies a Literal Father, the Lord God Almighty, and a literal (begotten) Son, who was born OF THE FLESH.
“There is one body, and one Spirit [Holy Spirit], even as you are called in one hope of your calling; One Lord [Jesus Christ], one faith, one baptism, One God and Father of all, who is above all, and through all, and in you all.†Ephesians 4:4-6
“And this is life eternal, that they might know you the only true God, and Jesus Christ, whom you have sent.†John 17:3
In short, if you worship the Trinity god in any form you are worshiping Baal, who is Satan.
1 Corinthians 8:6 “But to us there is but one God, the Father, of whom are all things, and we in him; and one Lord Jesus Christ, by whom are all things, and we by him.â€