Two would-be Islamist terrorists have been convicted of planning to attack a train in Canada.

It looks like a typical FBI-led fantasy entrapment. What they talked about doing sounds bad (though the article is sketchy about what it was), but if the FBI led them to make the plan, they probably never would have done anything if left to themselves.

If it is possible to make contact with known potential terrorists, it is surely possible to monitor them to see if they ever plan any specific crime, without encouraging them to do so.