Jesus refers to the Father and the Holy Spirit numerous times. Why do people want to revisit ancient heresy like the Aryan doctrine or monophysitism today? Is it a lack of education? Did people never learn the Nicene Creed?
Shaff's history of the Christian Church written in the late 1800s is excellent and free to download online. There is lots of good scholarship online for free these days. Here is a site with the earliest manuscripts of the New Testament https://biblearchaeologyreport.com/2019/02/15/the-earliest-new-testament-manuscripts/
