Salaam Dr. Habib,
The first scholar that I know of who questioned ritualized fasting was Chekannur “Maulvi” (PK Mohammed Abdul Hassan) of Kerala, India. Unfortunately, all of his works and discourses are available only in his native language, Malayalam. Not being a Malayali, I haven’t had the chance to read any of his works, but have only learnt about his ideas second-hand from my Malayali friends.
Chekannur Maulvi also considered Namaaz and the Azaan as interpolations, and used to roundly blame Abu Huraira, whom he considered a Crypto-Jew, of introducing and publicizing many practices that didn’t exist in the Prophet’s time.
As I stated in an earlier post, Chekannur Maulvi, in the prime of his career, was kidnapped and murdered by an extremist Sunni group opposed to his ideas. One of the main objectives of the murder must have been to prevent any further propagation of his ideas. Perhaps this is why the works of Chekannur Maulvi have not been translated from Malayalam into any other language, as his followers must have feared for their life if they did so.
So, whilst having reservations about Dr. Zaman’s ideas myself, I must let you know that objections to “Saum” as “Roza” are not new, as Chekannur Maulvi had raised his objections back in the 80s.