I think the article is misguided and I could type up a lot about it but what it essentially comes down to is that I think there is a cultural double standard when it comes to black people. Yes, violence, drug usage and misogyny features prominently in rap. It's also present in rock, metal, blues, pop, and other musical genres.
I may be misreading, but Malco seems to be saying that it is this perception of black youth that caused the shooting and without changing this perception, Martin's death will be in vain. I don't think that we'd level a similar charge against a white teenager who spent his time listening to Pantera or Slayer. Lennon's violence against his wife, Zeppelin's philanderings with women, Lou Reed's drug usage, etc., etc. for some reason do not become identifiers of white culture, or justifications for crimes perpetuated against white people, whereas Chris Brown's abhorrent violence against Rihanna is used in that manner.
I don't think that the answer to institutional racism is for blacks to change their culture. That culture is an organic result of the social and economic conditions that it was raised in and its issues are symptomatic of the problems people face within those conditions. But yeah, Chris Brown is still an utter, oh hi Frodocious, didn't see you browsing there.