Very few cities on the planet with 6-7 million people in the immediate area have crime rates as low as Toronto. In fact, the murder rates in most rural areas of Canada are higher then they are in Toronto. So if the question is how are stricter gun control laws working out, the answer is quite well, perhaps the US should consider similar laws. That being said, it has been reported that under Harper's government that gun control laws were somewhat watered down in Canada; there will be some study into whether this was a factor in this incident.
Highlighting these stories merely helps illustrate how infrequently such incidents occur here. It's also in bad taste for you to take a story where two people died at the hands of a mentally disturbed individual to further your political agenda. I fail to see any Canadians demanding you lose your guns; some may however note your abnormally high crime rates ( considering the wealth of your country ) and hope you develop some common sense on the topic.