The truth is that Greenland is in the midst of a mining boom. The Greenland govt wants the mining companies' money, so they won't take strong action against this US mining company - but they also don't want breeches of their sovereignty by ignoring their laws, which is what this US mining company is doing - so they simply complain, issue a stern warning, and hope that 'someone else' will solve the issue for them. Its cowardice.

If USA takes over Greenland, it will be because Greenlandic government doesn't have a spine.