I'm not a Jay-Z fan and I'm not sure if this is even correct but if it is, it's just giving more publicity to Jay-Z. Personally, I think religion makes stars out of people who wouldn't be known otherwise. This might just push Jay-Z into superstar status.
I think the main thing turns off people to Christ is Christians. Yes, you know the type. Hypocrites. Sure, there are some who are wonderful people but try to find some good Christians. I'ts not easy. Here's a suggestion. If you call yourself a Christian, be like Christ and accept and love people and stop condemning them. Stop hating people. Be a good example.