The point is valid. Just compare the 'per capita rate of firearm homicides in Canada and the US... the US figure is quite astonishing being seven times greater than Canada.

According to a StatsCan report from 2012 – the most recent year available – the U.S. suffered a total of 8,813 murders involving the use of firearms that year. Canada, in the same year, recorded just 172 firearms-related homicides despite Cnada's relatively high rate of firearm ownership.

“When looking at firearm-related homicide rates in comparable countries, Canada’s rate is about seven times lower than that of the United States (3.5 per 100,000 population), although it is higher than several other peer countries. While Canada’s firearm-related homicide rate is similar to those in Ireland and Switzerland, it is significantly higher than the rates in Japan (0.01 per 100,000 population) and the United Kingdom (0.06 per 100,000 population).” per StatsCan.