Many feel that yes, this style of music does influence people to commit violent acts. What ever opinion you have the cause of this violence is much bigger than rap music. Beyond this, artists must be allowd to raise ideas and awareness without fear of offending and being squelched. This opinion was spoken by Alan Light writer for Rolling Stone Magazine. Live Aids concerts and the Nelson Mandella benefit, even used music to reach a mass audience that might not otherwise listen.
Music can do that.
What it can't do is create emotions out of thin air which dictate behavior. Everyone is responsible for their own actions. I feel if you are going to use lyrics of certain styles of music to act upon and cause destructive behavior, your an ass. In one study it was sfournd that if you ask high school students to tell you the story of their favorite song, they can't. What they're listening to is the beat.