*plays the devil's advocate* God can't use rap!
J/k! He can use it indeed! There's been many songs (of genre's you woulnd't expect) That have brought me to tears! My personaly belief is this, God created music (NOT SATAN) Therefore! he can use all types, no matter what they sound like (yes, even the kind with the growling and screaming!)
If you don't believe that, let me take you back to the verse of 'All things are possible with God'
Do ya REALLY believe it!? (let me say, if it goes contrary to the word, avoid it) It's funny, cuz when we THINK we have God figured out...he's got another thing he's gonna throw our way, that we think is the devil, and he's (God) actually using it. How awesome is He?!
Radio U usually plays a BIT of christian rap (and mostly christian metal)