And when they aren’t contaminated, the message was usually something like “great! kill anything that comes from that path we came, and forget we came here!”

Just to ask but… both at the same water supply?

There’s no problem. The tariffs on the US side are enough to destroy the US economy already. Canada is only retaliating because their people require that their government hits back.

(And they seem to be retaliating very smartly only on products that won’t hurt their competitivity.)