Circumcision
Circumcision is very important to most branches of Judaism, with over 90% of male adherents having the procedure performed as a religious obligation. The basis for its observance is found in the Torah of the Hebrew Bible, in Genesis chapter 17, in which a covenant of circumcision is made with Abraham and his descendants. Jewish circumcision is part of the "brit milah" ritual, to be performed by a specialist ritual circumciser, a "mohel", on the eighth day of a newborn son's life, with certain exceptions for poor health. Jewish law requires that the circumcision leaves the glans bare when the penis is flaccid. Converts to Conservative and Orthodox Judaism must also be circumcised; those who are already circumcised undergo a symbolic circumcision ritual. Circumcision is not required by Judaism for one to be considered Jewish, but some adherents foresee serious negative spiritual consequences if it is neglected.
Circumcision of Jesus
Other late medieval and Renaissance depictions of circumcision in general show antipathy towards Judaism; caricatures show the procedure as being grotesquely cruel and the "mohel" as a threatening figure; Martin Luther's anti-Judaic treatise of 1543, "On the Jews and Their Lies", devotes many pages to circumcision. Some late-medieval German depictions depict the "Circumcision of Christ" in a similar vein, with the baby not held by his parents and the officiating Jewish officials given stereotypic features. In at least one manuscript miniature women are shown performing the rite, which has been interpreted as a misogynistic trope, with circumcision represented as a form of emasculation.