Well, i personally think that is something that you should be concerned about. A person that is openly satanic is not as dangerous as the unsaved person that does the devils deeds unknowingly. You see, it is easy to recognize the devil in a demonic outfit, but what we should open our spiritual eyes to are the things that we dont see on the outside. I would never purchase a Kanye West album, Why? Because although he claims to be a christian, i have heard a few of his others songs and they vex my spirit. As a christian I dont want foul music in my spirit. I dont want to walk around singing those kinda songs or watching those types of videos.
i
think i speak for just about every accomplished musician on this site when i say, "you have to learn how to filter the music."
what i mean is, you have to learn how to drain all of the good from music and leave behind the bad. i will listen to almost anything if i like it and it gives me good musical ideas but if the lyrics are foul, then i just block it out and concentrate on the music. i have lots of jazz and r&b experience but i had to get it from the clubs. the clubs have people drinking, smoking and women trying to take you home. i had to filter my setting. I stole the experience to better my craft and left behind the bad. this also goes for playing in church. i have had alot of experience with gospel choirs and groups and believe me, even though there is nothing wrong with the lyrics, after rehersal, you got women trying to take men home and men trying to take men home!
LOL! thats gross but its true and you still gotta filter the music and experince and leave behind the bad!
if youre capable of doing this, then you can and will grow musically and gain versitility in your playing.
its about being mature enough to be mature! 
(just my thoughts, nothing more)
peace and love
