Apart from a few isolated incidents, Muslim terrorism has never been an issue here. The worst terrorist attack involving Canadian victims was the Air India bombing over the Atlantic, which occurred in the mid-1990s. Security breaches involving aviation still happen but they inevitably fail. The same is also true of the USA.
The biggest threat to safety on either side of the border is and always will be homegrown criminals. Best example I can cite: Toronto, a city equal in population to Chicago, just recorded its 60th homicide of the *YEAR*. I’ve lived in Toronto all my life and can state from experience that a homicide count that high is simply unacceptable to everyone else who lives here, including our criminals.
Demographics matter.