The four cornerstones of gangsta rap music (seemingly the dominant subset of it) are:
1)Prostitutes (And pimps and promiscuous sex and STDs that go along with that)
2)Guns (And you can bet those aren't being used for self-defense against wild animals when you travel to your remote cabin in the woods for a weekend)
3)Drugs (These are self-evidently bad, so no need to elaborate)
4)Money (Often obtained as a result of illegal use/exploitation of some or all of the above)
And even absent all that you can often hear lyrics about the performer singing about how he (or the song's protagonist) "couldn't make it in a white man's world": Afroman - Palmdale.
That type of depressive, often criminal culture seems to fit the description of "self-destruction".
> no one conflates the behavior of say redneck Americans or free love hippies with the self-destructive culture of white America.
Neither rednecks nor hippies have any significant influence on how an average white american behaves. Most people would struggle to name any names.
Yet it's trivial for people to name a few prominent gangsta rappers. Heck, those who achieved cult status were shot in mid 90s.