Full Idea
Jesus was a member of the school of Hillel the Elder, and may have sat under him. He repeated some of the sayings of Hillel, ...and turned his ideas into a moral theology, stripping the law of all but its moral and ethical elements.
Gist of Idea
Jesus turned the ideas of Hillel into a theology reduced to its moral elements
Source
report of Jesus (reports [c.32]) by Paul Johnson - The History of the Jews Pt II
Book Reference
Johnson,Paul: 'A History of the Jews' [Phoenix 1993], p.128
A Reaction
The crucial move, it seems to me, is to strip Judaism of its complexity, and reduce it to very simple moral maxims, which means that ordinary illiterate people no longer need priests to understand and follow it. Jesus was, above all, a great teacher.