I have read a few articles following a similar argument to this, and find no reason to doubt such a claim.
The use of cannabis and cannabis derivatives has been documented for thousands of years, all over the world. Why is it so hard to believe that Jesus may have used them? Because it might tar his "squeaky-clean" image? Because society has told us that drugs are "evil"? Or because people that have been anti-drugs don't want to conceive the fact that the "Son of God" may have used the very subsatnce to which they are opposed...
I'm not religious, never have been, doubt I ever will be. I think religion, whether it be Chritianity, Judaism, Hinduism, Sikhsm, or whatever, is the root of the worlds evil...how many wars have not been caused due to religious, ideological conflict, or have not involved a religion being targeted. Very few...
Belief in a religion is the human races attempt to justify their meaningless existence on this little planet...
I'm affraid I have to follow the idea of William of Occam, and numerous people who have posted, that the simplest explantion is the most likely; Jesus, the son of God had "magical" powers, who could heal people, walk on water, turn water to wine etc., or that the use of drugs, by a man named Jesus, provided healing properties and mind altering experiences, was common practice, and that modern interpretations of such events are over-exaggerated, and have been altered over time like Chinese whispers. I beleive in the latter...
P.S, If im wrong, im fucked...but at least I can try and justify why I lived my life how I saw fit...