Sephardic Jews in the Netherlands of Sephardic Jewry in Amsterdam, the Mahamad also closely controlled the process of re-judaization - that is helping those whose families had been secretly living as Jews while being outwardly Catholic return to a full Jewish life. In this process, several individuals rejected Rabbinic Judaism or advanced ideas outside of the norms of Judaism at that time and were disciplined by the Mahamad through the process of herem, which could be anything from denial of Torah honors to an outright ban on the individual. The most famous of those to receive a full ban herem was philosopher Baruch Spinoza, whose
Sephardic law and customs a local custom. So far, then, it is meaningless to speak of "Sephardic custom": all that is meant is Jewish law without the particular customs of the Ashkenazim. For this reason, the law accepted by other non-Ashkenazi communities, such as the Italian and Yemenite Jews, is basically similar to that of the Sephardim. There are of course customs peculiar to particular countries or communities within the Sephardic world, such as Syria and Morocco. An important body of customs grew up in the Kabbalistic circle of Isaac Luria and his followers in Safed, and many of these have spread to communities