If boat trips from a few hundred years ago are not a claim of ownership, then why should this just apply for Denmark in Greenland, and not also for the European colonizers in North America?
The United States is expected to focus heavily on maintaining dominance in the Americas, while still regarding China as a major strategic competitor in the Asia-Pacific.
Unable to exert any real-pressure on Israel, the Obama administration is continuously protecting it against any UN admonition over its blatant violations of international laws.