Difficult question to answer.  He did marry a young girl (under 10) but did he have sex with her?  Again, difficult to answer.

What is certain is that many muslim men gang rape under-age girls.  Equally Sadiq Khan, the Mayor of London, would not answer questions about muslim men raping under-age girls which suggests that it does go on.  Because of the lack of condemnation by the islamic community we can only assume that sex with underage girls is part of islamic culture.  Therefore, was muhammad a paedophile?