Hello Rusmeister,
I haven’t actually posted in apologetics before. However, I plan to in the future so perhaps I could help to answer your question anyway. I am an Atheist. I was initially attracted to Lewis’ works when I read
The Chronicles of Narnia at a young age. I started reading Lewis’ other works because he was one of my favorite authors and I was curious about his other writings. Admittedly, a large part of what attracts me to his works is his style, especially his voice; however that does not mean that I disregard his message.
When I read Lewis’ works, I suppose you could say that I regard his message as ultimately “untrue” because I don’t believe in the existence of God. However, this does not render his works useless to me. His works have made me more open to the idea of religion and as a result I have a lot more respect for people who are Christians and of other religious persuasions. Just because I do not believe in God, does not mean I am not curious as to why other people do believe. Christianity is a large part of the lives of many of my friends and family so Christianity is important to me, despite the fact that I am an Atheist. There are also many secondary aspects to Lewis’ works which I do agree with such as love and happiness and morality. I find these concepts just as attractive as anyone; I simply disagree with the reasons why.
I can not speak for other non-Christians, but there are a couple of reasons why I would find debating Lewis’ message in this forum, or elsewhere, unappealing. Firstly, when reading the books I don’t go into them with the purpose of disproving them. If I did, I wouldn’t like them very much. I read them to gain information with as open of a mind as possible. Secondly, I don’t think that a debate of such type would go any where. There is no definite evidence that proves or disproves the existence of God. In the end it all boils down to belief and while it is, probably, the truest response, “Lewis is wrong because I believe it to be so” sounds like a pretty lame rebuttal to his works.
Hope this helps!