I'm gonna take a wild stab in the dark judging by the rust around the badge that this car was made before this person made the choice to boycott the US.
Many things already are, but it's not an environmental choice but a boycott so it's not about being overseas or not anyways. Why support a country that's actively hostile to you, ya know?
In practical terms it tends to be buying the strawberries from Mexico instead of California for example. The grocery stores literally have little maple leaf symbols on the prices to help, and little tariff symbols as well. Plus people aren't traveling to the US as that's a way of not "buying" from there too, often opting to travel within that country or overseas.
Agreed. That's why dog-whistles work so well; you can retreat to the reasonable point while also getting the unreasonable one across to those you're really talking to.
Let me put my hazmat suit on and try to steel man Kirk's comment. Can't stress enough that this is not an endorsement of the guy.
Deification is a slow gradual process that happens in the culture so of course it can't be pinpointed. The way people quote just the "I have a dream" stuff but not the criticisms of capitalism or other more "extreme" views of MLK sort of point to a legendary development where people don't actually celebrate the real man. This is used by the ruling class (they likely helped it happen too) to prevent any meaningful change (especially considering what they did to MLK) and just apply a veneer of progress while still oppressing and sowing division in the population.
Scar(r)y