I probably listen to more rap than the thug huddlums you're refferring to. I am nothing near what they are. You would never even guess I listen to rap if you saw me. Thus, while music is influential, it doesnt create people into who they become. People do that to themselves, and if they become a bunch of pussy's or act retarded it's because they are a bunch of pussy's and ARE retarded.
Music only goes so far, after a while, it comes down to the people, how smart they are, and how much the internalize the music they listen to.
You put dumb people with any kind of music for a while and they'll conform to whatever it is, regardless of what it is they're listening to.