The Inuit are around 4% of Canada's Indigenous population, so I'd be surprised if many of the people committing those murders were raised with this particular traditional Inuit anger-management strategy.
You changed the meaning in your quote: "First Nations, Métis and Inuit make up only 5% of Canada’s population, but in 2018 they made up 22% of the country’s homicide victims."
There's a massive inferential gap between Inuit children in the 1960s being taught to control their anger like this and Indigenous people being murdered now.
- How common are these parenting techniques across Indigenous populations?
- What sorts of people are committing those murders? Why?
You brought up the murder rate to claim that this "Does not seam to work very well", but linking this one method of teaching Inuit children emotional regulation to Indigenous murders is a big stretch in many different ways.
There are many issues these populations face, but it's unlikely that many of them stem from any particularly good (emotional regulation?) or bad (spanking?) parenting technique used on 3 year olds.
That article doesn't support your claim that this parenting style doesn't work, if anything, it refutes it:
> Nunavut has the highest per-capita murder rate in the country, but statistics can be misleading.
> Nunavut is in line with the national Homicide Survey: a large percentage of murders are committed when the assailant is under the influence of alcohol.
> if you took another area similar in housing shortages and alcoholism, you would have a similar crime rate.
> "It's a little unfair to look at Nunavut and the crime rate that it has and sort of assume that it's all Nunavut's fault," he said.
The geographic and economic uniqueness of Nunavut are gigantic uncontrolled variables in your assertion that the cultural correlation is causation.
That's not a claim but rather questioning the efficiency.
But sure it's not that easy, if you destroy one's culture, trow them into another world and let them barely "survive" other factor's play into the hole thing.