Also the now non-zero possibility of an actual conflict if the threats to invade Canada and Greenland aren't complete bullshit. (Which is the only defence Trump supporters have for those statements, of course)
I don’t really understand why I, as a European (from a country other than Denmark), should care about the affairs of the USA, Canada, or Greenland. And vice versa - why should those countries be concerned with the issues of my country? As a consumer, their internal conflicts have no relevance to me at all.