Most of it. I shouldn't be so flip about it, at least in one regard.
I don't know if this has changed since the class I took, but THC used to be difficult to classify, since it had a different effect depending upon dosage.
In small amounts, it acted like a stimulant. In larger doses it acted like a depressant. In massive doses, assuming the user didn't pass out, it could become an hallucinogenic.
From what I hear, average potency has gone way up since the 60s.
Also, there are a lot of other compounds that change its effects, in addition to the concentration of THC. Pure THC, closer to what you'd have in hashish, is a different "buzz" than what you'd get smoking a joint with all the other compounds changing things.
With super strength THC altering brain chemistry of a brain that has allah playing in the background? Sure, it could be just the right, wrong combination.
I'm not ruling out the connection and I don't mean to sound that way.
I just reacted to what initially sounded to me like terrorism is marijuana's fault rather than allah telling them what to do.
I probably should have said "marijuana is difficult to classify" not "THC", since I think that is how it's categorized.
It's been a while since I read that and I might have gotten how they list it wrong. Age and a couple those head shots might have taken a toll on my memory.