If you look at iTunes Radio Streaming, take one look at how Apple Corp has organized genres of music.
Anything relating to God is considered Religious, while all other genres of music are not.
Another way to look at this is the longwinded way:
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Adult Contemporary is not religious
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Alternative Rock is not religious
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Ambient is not religious
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Blues is not religious
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Classic Rock is not religious
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Classical is not religious
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College / University is not religious
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Comedy is not religious
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Country is not religious
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Eclectic is not religious
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Electronica is not religious
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Golden Oldies are not religious
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Hard Rock / Metal is not religious
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Hip Hop / Rap is not religious
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International / World is not religious
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Jazz is not religious
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News / Talk Radio is not religious
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Reggae / Island is not religious
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RnB / Soul is not religious
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Sports Radio is not religious
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Top 40 / Pop is not religious
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'70s Retro is not religious
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'80s Flashback is not religious
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'90s Hits is not religious
And...
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Religious is not any of the above
What you find under the religious tree, is all forms of religious belief piled into one lump sum. Apple doesn't bother putting Christian Radio Streams in one folder, Islamic in another, etc, etc..
In a sense, it seems Apple would rather you believe that a religious or spiritual belief is just another genre among disbelief; and even less, comes with absolutely no seperation.

