The address had some obviously egregious parts, most especially Trump's vow that if "the United States … is forced to defend itself or its allies, we will have no choice but to totally destroy North Korea." Even if North Korea had threatened to initiate force against the United States, which it has not, Trump's vow to "totally destroy North Korea" would still be monstrous because that action would not be defensive. If one must use force in self-defense, one may use only the force necessary to end the threat. Instead of pledging to engage in defense, Trump was threatening to commit an horrifying war crime.
This, however, is an easy point to score against Trump. Anyone who gives his remarks on North Korea a moment's thought can see how wrong it is. Aside from that, Trump's address contained more-subtle depravities, for instance, his obsession with sovereignty. He used the word 21 times, tediously returning to the point time and again.