"I noticed in your book, if I understood you correctly, andrew, that you
suggested that, had a wider body of Jews accepted the Messiah - or
perhaps implicitly, the national / religious leadership? - this might
have led to the developement of a more Hebraic character to the
Christian faith."

Had the Jews accepted Jesus as the Messiah there probably would not have been Christianity.

Additionally, if Jesus had not been murdered there might not have been Christianity.

I believe it is those two items that began a new religious movement.