If Canada and Mexico started letting Iran launch bombing sorties against US cities from within their borders, would the US consider them neutral?

2 Million a ship seems like a pretty cheap price to pay for the damage the us and Israel have inflicted on Iran - they cannot be made to pay it though, so I suppose the rest of us will have to (through marginally higher oil prices in the long term - much less than the spectacularly high oil prices the US war will cause in the short term)

The value of the oil / natural gas production in the Gulf states is not infinite. Nobody except the US has the force projection capacity to fight a major war against Iran. If they are not interested in fighting that war, the rest of the world will find that the cheapest and least disruptive option is to cut consumption. To assume that nobody is shipping oil and natural gas from the Gulf, until a new status quo emerges in the region.

Most nations who are affected don't have a blue-water navy or similar means to pose a serious threat to Iran. They have to either back the USA or deal with the toll and the uncertainty that comes with it.