Given that drug use is illegal, and that police spend a large fraction of their time committing violence on drug users, these factoids are neither surprising nor revealing.
This is what I mean by being careful not to just be dismissed as a crank.
I offered up front that these statistics in themselves (just like the ones you offered, thus the purpose) don't really mean anything definitive in themselves. But instead of concurring, or stating that it is a chicken and egg argument, you take off on a knee jerk rant about how its the police officers at fault for being assaulted. What percentage of the calls began with a call to the police about a crime or violence? The police very rarely stop anyone (who isn't driving) on suspicion of being high. Just a tip, but paranoia never endears confidence.