Samaritans who converted, perhaps. The Samaritans made the same mistake as the jewish leadership did, later. There is nothing that says, salvation is from the Penteteuch.
Obviously they had to leave their former ideas and accept the Messiah that they too were expecting. Remember that Jesus was sent exclusively to "the lost sheep of the house of Israel"...not to Samaritans or Gentiles. Neither was he sent to the religious leaders, whom he denounced at every opportunity.
Jesus gave Peter the keys of the Kingdom as the apostles would go on to widen out their preaching work after his departure, to include the Samaritans and the Gentiles.
The Jews rejected Jesus because the Pharisees had built up a false expectation as to what the Messiah would actually do. He was not the strong political figure that they had envisioned, who would liberate Israel from the yoke of Rome and establish the Kingom of God on earth with those self-righteous hypocrites featuring prominently in the process. Jesus' denunciation of them vexed them to no end and fueled their murderous hatred even more against this 'false Messiah'.....but true to prophesy, (Romans 9:27) a remnant of natural Israel responded to Jesus' ministry and thousands of Jews were saved out of that corrupted nation.
Samaritans and Gentiles also responded so that Paul could identify the mixed Christian congregation as "the Israel of God" (Galatians 6:16)....no longer made up of just fleshly Jews, but all counted as spiritual Jews.....not with a circumcision of the flesh, but of the heart.
Romans 2:28-29...
"For he is not a Jew who is one on the outside, nor is circumcision something on the outside, on the flesh. 29 But he is a Jew who is one on the inside, and his circumcision is that of the heart by spirit and not by a written code. That person’s praise comes from God, not from people."
What the Penteteuch did for the Samaritans was prepare them to expect the "prophet greater than Moses" whom they knew was coming.