There is some truth to this, but are you trying to say that the culture is no better or worse than it was 50 years ago? Our cultural exports are far more depraved than ever before in our history. Something like gangster rap would not even be permitted to exist a few short decades ago, and not because of racism.
In the 1920's, swing bands were considered an example of moral decay. Now we look back on that and say, well it was the music that the parents were offended by, or it was a different time. But was that it?
Yes, I am offended by the vuglar language in Rap Music, but am I offended by the themes of sexuality and drug use? If so, shouldn't I be offended by the themes of sexuality and drinking in Country Music? Or early Jazz?
The morals of this nation have always been in question by sincere Christians. From Johnathan Edwards and Cotton Mather to Pat Robertson and Billy Graham, the concern for our nations soul have been heard through the ages. This doesn't mean there isn't a legitimate concern and fight on our hands, but the handwringing and "Woe unto us!" attitude is akin to crying "Wolf!" repeatedly. If Glen Miller didn't bring us to ruin, and Elvis didn't, and the Beatles didn't, and Jimi Hendrix didn't, and KISS didn't, and Marilyn Manson didn't, why would anyone believe that Brittany Spears will?
Getting a clear perspective on what is and what isn't a true threat to Western Culture is attained by examining the history of the Culture and what has and hasn't been real threats in the past.
Standing with Islam to face down a perverted Army Private is typical Buchanan. Run off the cliff to escape the wolf only he can see.