I see a lot of TS (here and from friends) saying this is a good move by Trump, but I am a loss to understand why this is positive?

A direct quote from the new PM that can be found here: https://globalnews.ca/news/11100883/donald-trump-tariffs-auto-canada-response/

“Over the coming weeks, months and years, we must fundamentally reimagine our economy,” Carney told reporters in Ottawa after meeting with the cabinet committee on Canada-U.S. relations. “The old relationship we had with the United States, based on deepening integration of our economies and tight security and military cooperation, is over.”

I’ve heard it’s all part of Trump’s master negotiating skills, but from my perspective it’s causing the opposite. Canada has a growing anti America sentiment now that I am positive is going to be long lasting. It’s not just the two governments arguing now, but regular Canadian citizens now.

Anyway - what’s the end goal here; why is this a positive for America?