Non-Jews who masquerade as Jews, who proselytize and spread a Christianized message. They developed as a Hebrew Christian movement, and they still are and always will be a Christian sect falsely attempting to align itself with Judaic teachings, teachings which they negate and undermine by...
...methods of Talmudic study? Professor Talya Fishman's book 'Becoming the People of the Talmud' briefly mentions them, as does a short selected essay in my Jewish Study Bible, but I can't seem to find any books that discuss the numerous tosafist rabbis in any great detail.
If anyone knows of...