There definitely was a range of heretical beliefs which were often addressed by Paul and the other Apostles in the early churches. The letters which were circulated, which are now books of the NT, demonstrate this. I’m sure not going to trust the views of an atheist concerning biblical history. I do trust that God was capable of and did indeed orchestrate the accurate writings to be included in the Bible and preserved through history. As well, that God is One, yet three Persons in light of the scriptures is the only perspective that makes sense in order to have unity and diversity, which describe the Creator God of biblical Christianity.
“The Bible presents a God who did not need to create any beings to experience love, communion and fellowship. This God is complete in Himself, being three Persons: Father, Son and Holy Spirit, separate and distinct, yet at the same time eternally one God. They loved and communed and fellowshiped with each other and took counsel together before the universe, angels or man were brought into existence. Isaiah "heard the voice of the Lord [in eternity past] saying, "Whom shall
I send, and who will go for
us?" (Isa:6:8). Moses revealed the same counseling together of the Godhead: "And God said, Let
us make man in
ourimage, after
our likeness"; and again, "Let
us go down, and there confound their language" (Gen:1:26
;11:7). Who is this "us" if God is a single entity? Why does God say, "The man is become as one of
us" (Gen:3:22)?“
The Trinity