But other causes flow from the temper of the times. It’s considered inappropriate or even immoral for white musicians to appropriate African-American styles. ~David Brooks

Really?  I mean, really?  By whom?  Even some musicians in relatively conventional alternative rock (if you can call it that) have strong blues roots.  Take, for example, Chris Cornell (whose blues influences are more evident in his first solo album than in his work with different bands). 

Update: James shows that he is one of the seventeen people on earth who are familiar with Euphoria Morning (that’s the first solo album mentioned above).  Bravo!