China captured 2 Canadians as retaliation. Wanting to de-escalate and get them back seems pretty reasonable. Unless the US proposed a military operation to get them back?

They still did that. Even though being a pawn in another player's game (USA trying to kill its technological competitor) and paying for it in many different ways was definitely not in the Canada's interests.

You seem to have this strange position that "what's good for the US is also automatically good for Canada, or at least it doesn't matter what Canada things and what it's national interests might be; just shut up and do what we say (even if it's a command to jump from the building)".