So, actual sane Canadian here;

The death penalty has been shitty in every regard and the only defenses people throw at it don't hold up to statistical analysis. Innocent people have hung and It's been proven it doesn't even deter would be criminals so there goes the major argument for it. https://www.ojp.gov/ncjrs/virtual-library/abstracts/canadas-successful-experience-abolition-death-penalty

In '83,. 20 years after the last hanging they noted lower crime rates and safer police officers. Execution is a public martyring for serial killers and in some ways exactly what they want so they go all out. A life sentence on the other hand sucks ass and you actually have to live through.

as for the actual study, it's weak af. 1000 Canadians, and this website has been repeatedly asking the same question. and it's only framed "for murderers" which is dehumanizing language in itself. But, ~70% of conservatives are bloodthirsty maniacs so it pushed it just past 50. But I'd also argue that most conservatives are so uninformed it's basically weaponized at this point, so if you fall in that venn overlap the onus is on you to "do your own research" but actually stick with real sources and not the alternate misinformation rabbit hole where you can't get original studies if you try. Be mindful when an article is telling you exactly what to think.