When a political leader frequently issues apocalyptic threats without acting on them, the public becomes desensitized. The rhetoric is dismissed as bluster (a "Taco Tuesday"), dangerously lowering the bar for acceptable discourse and eroding the impact of genuine warnings.
Subordinates in volatile administrations may publicly praise their leader, even when disagreeing, as a pragmatic tactic. This "ass kissing" is seen as a necessary cost to remain in a position to moderate policy and prevent more extreme loyalists from gaining control.
A leader's bombastic, civilization-ending rhetoric often serves as a distraction from the military's actual strategy. While Trump threatened to "wipe out" Iran, the US military was simultaneously conducting a targeted strike, showing a disconnect between public posturing and operational reality.