The law against cannabis Witchcraft all goes back to early Judaism. The Jewish Torah, Christian Bible, and Islamic Koran (Quran) all specifically call for the death penalty for Witcchraft. This is the basis for all U.S. federal and state laws against cannabis Witchcraft.
The main verse against Cannabis Witchcraft is Exodus 22:18.
Additional verses against Cannabis Witchcraft are found throughout the Bible and Torah.
Canon Eposcopi passed in 906 C.E. This collection of church laws declared that belief in Witchcraft was heresy.
Summis desiderantes affectibus is a 1484 edict issued by Pope Innocent VIII alleging that many men and women were in collusion with the Devil. All Christians were required to assist the two Dominican monks, Jacob Sprenger and Heinrich Kramer, placed in charge of handling this supposed Witchcraft problem.
In 500 C.E., the French government passed a Witchcraft law requiring proof that an act of evil had been committed. Otherwise the accuser had to pay damages. Under modern U.S. law, DEA agents and other Christian police are immune from having to pay damages for false accusations.
In 1390, the Parlement de Paris encouraged secular courts to take over from the Inquisition. The first French secular Witch Trial was held that year and over the next few hundred years cases moved from Church Inquisitions to secular Witch Trials.
In 1579, the French government extended the death penalty to everyone who practicied any form of divination.
United States law
In 1970 the U.S. Congress passed the Controlled Substances Act (CSA) as Title II of the Comprehensive Drug Abuse Prevention and Control Act of 1970.