Cannabis use among students increased 250 percent from 1984 to 1992. During the same period, shootings rose 40 percent, car thefts increased 62 percent, and hold-ups rose 69 percent.
They are specifically trying to correlate these two factors; however, they didn't specifically say increase was within the student population.

Amsterdam's rate of burglary is now twice that of Newark, New Jersey.
I just did a quick search on the populations of both towns and Amsterdam's looks to be twice the size of Newark's.

The city's 7,000 addicts are blamed for 80 percent of all property crime
Is this like how Americans have blamed immigrants for stealing our jobs?

I find your first quote the strongest. It definitely wasn't a scenario I thought of. Rhabbi, I am interested in what you would think they best way to work on the drug problem is.