Music is personal. If it doesn't affect your faith or values, why worry? People will always judge. Just do what feels right for you.
Some people believe this people got most of their music from an ocultic source. Although some of their music content may be meaningless, were some may be meaningful. The meaningful one can be listening to. Moreover, are you been judged by your mind and conscience anytime you listen to this music? If your conscience doesn't judge you and it isn't against the doctrine of your religion, then I don't think you have anything to worry about.
Music is meant to send meaningful message to it's listeners and it doesn't have to be some lyrics that praises the name of some supernatural god of some adherents before it could be said to not be worldly. Though some people are too religious that even songs which sends messages about romance which could be enjoyable to listen by couples still turns to be referred to as some ungodly songs. It's kinda stupid though but It's my opinion that people should just listen to musucs that lifts their spirit, give them joy and doesn't have swear words or hate words in them and forget what others have to say.