Everyone wants to prevent mass homicides. There isn't a pro-mass homicide constituency on either side of the Canadian gun debate.
Suggesting that Canada risks going down the US road is not reasonable. The legal structure is different. The culture is different. We have a significant legal regime including graduated licensing, universal background checks, waiting periods, training requirements, testing requirements, mental health disclosures, spousal sign-offs, simple revocations, and safe storage laws that have broad consensus and mostly have a greater basis in evidence than by-type bans.
Canada was not the Wild West prior to 2020, and it is not likely to become the Wild West should the legal regime be restored to where it was in the Harper era.