On Lewis: Article: 'Lewis said he hoped the book would soften-up religious reflexes and "make it easier for children to accept Christianity when they met it later in life".'

Separately:

You: "because they believe that it is itself a bully"

To be fair, there is a *lot* of history and even current practice behind that. For most of its history Christianity has been the quintessential "we are the one true way" religion. Judaism is monotheist but a tribal non-missionary religion, while Islam usually at least tolerated other monotheists as second-class citizens, better than Jews were in Christian Europe. I've read that part of what sped the initial Arab conquests was that Christians found it easier to live under the Muslims than under different kinds of Christians!