Less invested social commentators such as Stephen Lord "Lordy" on Google+ have asked:
"Why is it that illegal drugs are an excuse for a crime?
...
Before blaming the drug, try blaming the incredible arrogance or ignorance of the person who used a drug that has a history of turning users violent _anyone recall a story about a homeless guy getting his face eaten off?
How does blaming one illegal act excuse another?"
My answer to him is that western society has invested so much in the view of the drug user as "Victim" and the supplier as villain that its official disinformation channels find it difficult to find any different narrative.