The War on Drugs?

Mexico, in the midst of a supposed "war on drugs" has just passed legislation legalizing possession of small amounts of drugs including marijuana, cocaine, heroin and amphetamines. Despite the obvious ridiculousness of this move, officials and prosecutors in Mexico claim that they made the right choice, saying, "the new law sets clear limits that keep Mexico's corruption-prone police from extorting casual users and offers addicts free treatment to keep growing domestic drug use in check." [1] So my question is, when did arresting casual drug users become a bad thing? They're still drug users. And any sane policy maker would agree that being a drug user should make you a criminal.
Espino del Castillo, of the Mexican Attorney General's Office says, "We couldn't charge somebody who was in possession of a dose of a drug, there was no way ... because the person would claim they were an addict," [1] Hold on. You're saying that by claiming that they are an addict, a person in possession of drugs can just get off free of any charges? It's only illegal if you aren't addicted? How can any drug user of an addictive drug not be addicted? Possession of illegal drugs is a crime, whether you're an addict or not.
So, the real question is, are the Mexicans just plain stupid? Do they really not see the gaping holes in their logic? Well, they can't because there is no logic whatsoever to back this up. In my opinion the Mexican government hasn't completely lost its collective mind. The real problem is corruption, at all levels. The whole world knows that practically the entire Mexican police force is corrupt, and that a major problem in dealing with the drug war. So its not much of a stretch to come to the conclusion that the Mexican government is also corrupt. Why else would they make a law that benefits the drug dealers and kingpins?
And they had the nerve to tell us our guns were the problem. Well, they were part of it, but come on.