I'll take a whack at it...
Yeshua was necessarily Torah observant, else he cannot be the perfect sacrifice. As the great prophet too, as you know, or he would be a false prophet. But I will draw a distinction you probably won't like - Torah observant wrt Moses - The written Word. At every turn he was against the oral law.
He did call Himself 'I AM', and accepted others who called him God... So I don't think the case can be made that he didn't call himself God. And I think he necessarily had to be God:
Seth, Enosh, Kenan, Mahalalel, Jared, Enoch, Methuselah, Lamech, Noah. == 'God has Appointed that Mortal man shall Sorrow... but The Blessed God, Came Down, Teaching... His Death Shall Bring, Strength and Comfort.'
Torah declares it.
As to the apostles, prove them in Torah, and I think you might change your view. I am by no means expert, but I read the NT as Yeshua's disciples continuing to be Torah observant.
They continued to worship in a Jewish traditional style, but clearly recognized Jesus as the incarnated God.
As Jesus began to appeal more and more to non-Jewish people, and existing Jews mostly went back to rabbinism partly out of force of habit and partly out of fear of persecution, those traditions were dropped in the associated Christian congregations.
New Testament scripture itself identified those traditions as obsolete (in the context of Christian observance). They survive in non-Christian Jewish observance, of course.