Well, I wouldn't call them an enemy.
I think that a lot of those who believe(d) in the war on drugs had good intentions.
The war is utterly baseless for many drugs, which turn out to be overall beneficial and have been used by humanity for thousands of years. The people with good intentions that started/run the war knew little about the pharmacology and history behind these substances. Or if they know about this, they rationalize it away (your source of income is a strong rationalizing force). They are in the grip of western culture arrogance and domineering attitude. They are doing much more damage than good with their war.
For example, Ronald Reagan suffered from Alzheimers. During his life he villivied the marijuana plant. Behind his leadership many lives were negatively affected due to his disfunctional view of nature. Turns out, the plant could have helped him manage and slow the progress of his disease. So Reagan himself had to suffer needlessly from his misguided beliefs.
Reagan villifying a natural plant based of false premises:
Reagan getting Alzehimer's:
https://www.reaganlibrar...-s-alzheimer-s-diagnosisReagan's last years:
http://www.newsweek.com/...disease-president-434187Newsweek wrote:And so began what Nancy called her husband's "long goodbye," which was, for her, 10 years of exacting caregiving, hurried lunches with friends, ever-briefer phone calls to the outside world, hours spent with old love letters and powerful advocacy for new research into cures for the disease that was taking Ronnie from her.
Turns out the plant and the research Reagan put roadblocks on would have helped:
https://www.nature.com/a...es/npjamd201612#abstractThe war on drugs is a disfunction, not an evil. It hurts everyone, on both sides.