MONTREAL — Pierre Céré makes an odd cheerleader for Justin Trudeau. A Quebec sovereigntist and longtime activist for the province’s unemployed, the 62-year-old is the antithesis of the current prime minister’s image-obsessed, conspicuously worldly brand of pan-Canadian liberalism. Yet in late November 2021, Céré delivered Trudeau an early Christmas present in the form of an 88-page encomium crediting the “audacious” federal government with saving the country from COVID-wrought economic collapse.