When young people, and many converts are young people, they are usually like Jihad Johnny. They come from very secular households with progressive parents who impose little structure and no discipline. These young people are attracted to islam like little Johnny was attracted to islam, for the structure it offered. The difference is, John Lindh did not take the plunge into terrorism until his father came home and announced to his family that he was leaving them for another man. A lover who owned a gay bath house. It might not be a rejection of Christianity driving converts into islam, but a rejection of homosexuality leading that particular move.