What matters is reaction after April 2, and so this posturing now may not matter, as long as a mission to win the trade war is adopted after "harsh US tariffs on April 2"
Winning the trade war is saving the Canadian auto industry, including ensuring Canadian auto production during the trade war. This can be done by making US energy and materials more expensive through export tariffs, and using export tariff revenue to subsidize materials and energy to Canadian/Ontario manufacturing. Pausing all military cooperation, and election interference/foreign policy propaganda, with US.
If resistance is just gaslighting, and Ford/Canada is willing to sacrifice auto industry, pivoting to China for better value cars, including FDI by China for charging infrastructure, or even better factories, must be a threat to US/auto industry to never sell another vehicle in Canada if they don't do the right thing.
Inflicting maximum pain on US economy, while helping Canadians, is only path to make trade war short, or affecting US midterms, if US depression is ignored.