Japan had an actual fighting force, and we had nothing compared to today
Japan and the powers that aligned with them were a real threat.
Fatboy Kim is an insect and could be crushed within 24 hours if we really wanted to.
He may be an “insect” but an insect with a nuke is still something that can sting badly. An insect with 10 or more nukes is something the U.S. cannot ignore. Waiting until we’re “surprised” to discover that he believed his own rhetoric is too late.