Origins of the Trinity in Scripture

I came upon a video where the presenter has the following to say and I want to find out whether someone has looked at this from a Torah perspective as general commentaries are from a modern-Christian view:

In the 16th century, Erasmus, a Dutch scholar, produced the first printed edition of the Greek New Testament. This edition, relied upon by later translators including those of the King James Bible, was based on a few late medieval manuscripts. Despite its significance, it contained some inaccuracies, such as the absence of 1 John 5:7-8, known as the Johannine Comma, a passage supporting the doctrine of the Trinity. Erasmus agreed to include it in future editions if presented with a Greek manuscript containing it. Opponents then produced a Greek manuscript, likely fabricated, to meet Erasmus' condition. Despite his initial misgivings, Erasmus included the Johannine Comma in subsequent editions, shaping the text used in English Bibles, including the King James Version.

I see that the NIV has replaced the popular version of 1 John 5:7-8 with:

"For there are three that testify: 8 the Spirit, the water and the blood; and the three are in agreement."