The central objective of increasing the security and military costs imposed on Iran is not necessarily to launch an all-out war, but rather to compel the Iranian leadership to accept a new deal.
With his reliance on naked power and rejection of all constraints on his authority, Trump represents the opposite of everything that made the U.S. great.
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?