True, there is no such person as a "Christian non-believer" --
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That is untrue.
Thomas Jefferson was Christian non-believer. He belived in the existence of Jesus and believed strongly that civilized man should try to emulate him. TJ disbelieved in all the supernatural crap that is attributed to Jesus. He even (secretly, while in office) made his own bible, called the Jefferson Bible, http://articles.latimes.com/20...05/local/me-beliefs5
There are many Christ followers out there who do not believe in the diety of Jesus but try to follow his example. I was even one of those for a while before I admitted my non-belief to myself.
If one is going to emulate some other being, I think Gandhi would be a better choice, He actually did exist.
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When I used the term "believer," it was within a frame of reference that I should have explained for those not familiar with the New Testament use of the term "believer." An example is found in Acts 5:14:
"And believers were the more added to the Lord, multitudes both of men and women." See I Tim. 4:12, also.
"Believers" and "believer" are used as synonyms for followers of Christ or "Christians." Thus, it is unnecessary to use both "Christian" and "believer(s)" to identify such persons. Hence the "redundancy."
Similarly, when the New Testament speaks of one who has "believed," that is a way of saying that he has become a Christian. See Acts 8:13 & 17:12.