The Old Testament is littered with the phrase “the word of the lord appeared “ and the lord said. It is not entirely clear who or what is happening. This figure seems to be recognized as god yet separate from god.
The entire book of John is dedicated to this idea. In the beginning was the word, no one has seen giod, only the son.
Jehovah witness theology on the subject never really bothered me ( god created an angel who created the world and everything then gives it back to god. ) What bugs me is they no concept of how the New Testament is referring to the Old Testament and nothing is really clear outside of Jesus being the visible manifestation of god in the Old Testament.
It is not invented by false religion . It is just in the bible. It is completely understandable who Jesus is god in the flesh.