Frankly, the War on Drugs is immoral. The science doesn't back it up[1]. It's done without caring about the consequences on peoples' lives, medical and otherwise.
> This is not the FBI enforcing the letter of some stupid law
Debatable! The drug laws are 'stupid', if you take into account science and economics[2].
> and was organizing assassinations.
This is unlikely to have happened under a system of legal drugs. I've never heard of Walmart -- where legal products are sold -- putting out hits on people.
The drugs laws are broken. They create perverse incentives.
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[1] There are a number of drugs less harmful than alcohol & tobacco (I.e. less harmful than drugs already sanctioned): http://www.economist.com/blogs/dailychart/2010/11/drugs_caus...
[2] The Economics Behind the U.S. Government's Unwinnable War on Drugs http://www.econlib.org/library/Columns/y2013/Powelldrugs.htm...