Original sentence: However, Zevi lost his credibility to all but the Donmeh when he converted to Islam and became an apostate to Judaism in 1666.However, the mythology behind these various competing theories is far more complicated, especially when Sabbatai Zevi, the "messiah" claimant and his supporters postulated that he represented groups in addition to those identified as being Jews
Edited sentence: However, Zevi lost all credibility when he converted to Islam and became an apostate to Judaism in 1666.However, the mythology behind these various competing theories is far more complicated, especially when Sabbatai Zevi, the false Jewish "messiah" and his supporters postulated that he represented groups in addition to those identified as being Jews