There were Jewish roots, but they did not follow or were they mandated by God to follow the Mosaic Law.
They did have the mosaic if they had the five books that were written by Moses. What do you think?
The reason why I asked that question was because what struck me was that the Samaritan woman said
John 4:25
25 The woman said to Him, “I know that Messiah is coming” (who is called Christ). “When He comes, He will tell us all things.”
It would seem to me that only a people who knew this would had to have had some Jewish roots.
Mind you neither did the mainstream Jews of the day follow the commands of God.
If we look at the OT they themselves feel foul of integrating according to the customs of the lands they were in.
In fact when Moses was up in the mountains receiving the commandant's they built a golden calf and worshipped it.
Enjoy talking to you as always