Many people have rejected the church because of organizational politics, obsession with doctrines, general complacency and the failure to follow in the commandments and teachings of Jesus with anything other than lip service.
However, these same people have not rejected God or their faith, but rather they have rejected a Church for its corruption. In many cases, the people themselves have also been rejected by their church.
Jesus welcomed all people. His church would do well to follow that example in practice, rather than theoretically or with rhetoric that is not credible.