What reasons do ex-Muslims give for why they left Islam?

In a Nutshell: Apostates usually abandon Islamic belief due to doubts or emotions and importantly personal autonomy, influenced by the dominant liberal moral frameworks and ideologies like scientism. Shah Nawas on FB provides a good answer. Many ex-Muslims online provide accounts for leaving Islam that are usually unpersuasive, ill-considered or highly personal. The book "The Apostates" is a sociological study of the social situation British and Canadian ex-Muslims focusing on what they say about themselves and their experiences of abandoning Islam. The author seeks answers to three questions. There is no such question as "