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.
There, I believe, is the great deception, born many years ago.