A range of Muslims continually follow the lead of typical (often) atheistic voices that Jesus was a product of ancient religious figures, such as Mithra or Osiris, etc.
So far, I have heard the claim that Christianity fused itself with other ancient religions, I am even aware of the theoretical assumptions of various scholars, if indeed we can call these theories, speculation might fit better.
I have previously, challenged our Muslim brothers and sisters about the matter, and asked them to present some evidence for these claims.
So far nobody has taken up the challenge.
So far the challenged has be placed on other treads, and the challenge has virtually been ignored.
However, I thought it reasonable to make this tread, were we can debate the particular issue, and define what is speculation and what is not.
Be blessed
Kai