I think that he's saying that drugs as the reason, in and of itself, was not why they were killed. Did trying to find their killers, and why the R family was killed, open up a Pandora's box? Yep. None of those may have been the actual reason the Rs and HHG were murdered though. My top theory has always been mountain justice. Quite possibly inner-family. Someone in that family has done something so harsh, that it has been seen as unforgivable. They didn't trust LE, or couldn't go to LE, to take care of the matter so they handled it themselves. When this first happened, I ran this by my kid who lives further up in the hills, and my parents. All of us from the region. Both said the same thing that I did. Someone in the R family did someone so foul, and it could very well be family, that they sought revenge. Now what that foul was, idk. But mountain justice is still a thing. All of us could be wrong, too.
On the other hand, someone may have done something so foul that they could never let it be told and made sure anyone who might know could never tell....