According to Orthodox Rabbi Schmuley Boteach, when Jesus is criticized for healing a crippled man on the Sabbath (John 5:1-47), Jesus quotes a legal precedent preserved in the Talmud to prove that his action is justified.
Boteach explains that the Torah commands that a male child be circumcised on the eighth day after birth, but if that day happens to fall on the Sabbath, the circumcision is still allowed even though it is “drawing blood.”
The Talmud draws from this exception the notion that medical procedures can and must be done on the Sabbath. According to Tractate Yoma, “if circumcision, which concerns one of the 248 members of the body, overrides the Sabbath, shall not a man’s whole body override the Sabbath?”
Boteach then points to the nearly identical reasoning used by Jesus for his justification of healing a crippled man on the Sabbath, recorded by John: “Now if a boy can be circumcised on the Sabbath so that the Law of Moses may not be broken,” Jesus says, “why are you angry with me for healing a man’s whole body on the Sabbath? (7:23 NIV).
This suggests that Jesus was not an “illiterate peasant”—as many contemporary authors claim—but a highly trained rabbi fully conversant with the complex legal and religious debates in his day.
A lot of these are only “new” if you were taught the things it debunks; that Jesus was a real Rabbi is hardly shocking or new!