Its just that being labeled religious does not automatically make one a Christian. A Christian born of the spirit and walking in the spirit is very different from a philosophical "Christian" who picks and chooses what he will believe. Good works should be a natural result of our faith, but works can never be a substitute. What I am trying to say (quite badly apparently) is that Christianity is far more complex and deeping personal that simply choosing to follow a certain system of beliefs.
I work in a very diverse work place with Muslims, Hindus, New Agers, and Christians all being very religious in their beliefs. I would rather walk and talk a life that shows my faith than to preach, judge and act like I have all the answers. All I can really do is testify "I know whom I have believed, and am persuaded that He is able to keep that which I've committed unto Him against that day"