The NT doesn’t promote Torah? Sure it does. We just have to read Scripture in context. Here’s just one example:
Acts15:21 For from the earliest times, Moshe has had in every city those who proclaim him, with his words being read in the synagogues every Shabbat." (CJB)
This is a fulfillment of Isaiah 56:1-9. Here we see Gentile converts observing Shabbat and learning Torah as one body along with Jews. Unfortunately, not long afterward, Marcion (whom Polycarp referred to as “the firstborn of the devil”) built the first all-Gentile church to promote Paganism. (Of course, no one noticed because it all “sounded good” so people blindly followed.
Marcion held his services on Sunday which blended with Zeus (the sun god) culture – which, of course was in total opposition to our Jewish Mashiyach. These modern theologies were based more on Hellenism than on original fundamental Hebraic values.
Marcion coined the words “Old - New Testament” and did his very best to warn Gentiles away from Torah and “the God of the Old Testament.” He also invented theologies known as replacement, dispensational, supercessionism, etc., which are very popular among Christianity today. (Source: AENT)