All moslems were something else originally. The history of Islam is one of forced “conversion”, so almost all moslems alive today are descendants of Christians, Jews, Hindus, Buddhists, Jains, animists, etc.
Also, importantly, the Zoroastrians of Persia, a religion that still exists underground in Iran and parts of India.
Exactly like "The Borg".
(wonder if that's what Roddenberry was hinting at?)