Can you put two and two together? Have a try. The authorities, and most of the media, cannot.
Did you know that the Copenhagen killer, Omar El-Hussein, had twice been arrested (and twice let off) for cannabis possession? Probably not.
It was reported in Denmark but not prominently mentioned amid the usual swirling speculation about ‘links’ between El-Hussein and ‘Islamic State’, for which there is no evidence at all.
El-Hussein, a promising school student, mysteriously became so violent and ill- tempered that his own gang of petty criminals, The Brothers, actually expelled him. Something similar happened in the lives of Lee Rigby’s killers, who underwent violent personality changes in their teens after becoming cannabis users.
The recent Paris killers were also known users of cannabis. So were the chaotic drifters who killed soldiers in Canada last year. So is the chief suspect in the Boston Marathon bombings of April 2013.
I might add that though these are all Muslims, who for rather obvious reasons are to be found among the marginalised in Europe and North America, it is not confined to them.
Jared Loughner, who killed six people and severely injured Congresswoman Gabrielle Giffords in Arizona in 2011, was also a confirmed heavy cannabis user. When I searched newspaper archives for instances of violent crimes in this country in which culprits were said to be cannabis users, I found many.
One notable example was the pointless killing of Sheffield church organist Alan Greaves, randomly beaten to death by two laughing youths on Christmas Eve 2012. Both were cannabis smokers.
By itself, the link is interesting. I wonder how many other violent criminals would turn out to be heavy cannabis users, if only anyone ever asked. But put it together with The Mail on Sunday’s exclusive story last week, showing a strong link between cannabis use and episodes of mental illness.
And then combine it with the confessions of two prominent British Left-wing figures, the former Tory MP and BBC favourite Matthew Parris, and Channel 4 news presenter Jon Snow, who both tried ‘skunk’ cannabis (by far the most commonly available type in the Western world) for a TV documentary.
Mr Parris wrote: ‘The effect was stunning – and not (for me) in a good way. Short-term memory went walkabout. I would forget what I was talking about even while talking. I became shaky. Time went haywire.’
But immediate effects are one thing. What about long-term use? Mr Parris recounted that he had ‘too many friends’ for whom cannabis had seemed destructive. He quoted one as saying: ‘I think it changed me permanently as a person.’
He said his mainly socially liberal friends, including health workers, generally agreed that ‘heavy use of cannabis, particularly skunk, can be associated with big changes in behaviour’.
Jon Snow said simply: ‘By the time I was completely stoned, I felt utterly bereft. I felt as if my soul had been wrenched from my body.
‘There was no one in my world. I was frightened, paranoid, and felt physically and mentally wrapped in a dense blanket of fog. I’ve worked in war zones, but I’ve never been as overwhelmingly frightened as I was when I was in the MRI scanner after taking skunk. I would never do it again.’
This is not some mild ‘soft’ thing. It is a potent, frightening mindbender. If it does this to men in late middle age who are educated, prosperous, successful and self-disciplined, what do you think it is doing to all those 13-year-olds who – thanks to its virtual decriminalisation – can buy it at a school near you, while the police do nothing?
And yet it is still fashionable in our elite to believe that cannabis should be even easier to get than it already is.
It is hard to think of a social evil so urgently in need of action to curb it. Why is nothing done? Need you ask?