Europe and Canada (and the rest of the world) need to stay firm (and as united as possible) and refuse to appease Trump at all.
Deny everything.
Boycott the World Cup. Boycott the Olympics. Sanction US tech, and create non-US alternatives.
And if that happens, it will motivate more people in the US who are disgusted by the policy choices of Trump and his Republican, tech industry, oil industry, and media enablers.