Complex sentence: Keshet-Rabbis is not an official arm of the Rabbinical Assembly and is it endorsed by it; rather, Keshet-Rabbis is a free association of rabbis who are members of the Rabbinical Assembly and who subscribe to the rationale and objectives of Keshet-Rabbis.
Split into simpler sentences: Keshet-Rabbis is not an official arm of the Rabbinical Assembly and is not endorsed by the Rabbinical Assembly. It is a free association of rabbis who are members of the Rabbinical Assembly and who subscribe to the rationale and objectives of Keshet-Rabbis.