If he needlessy sacrifices US troops in Japan (and they are in harms’ way now, and on his watch), so many of them killed or wounded, and no zero sum response to Pyongyang to settle the issue as quickly as possible, you can bet the Join Chiefs of Staff would/should have something to say about it. Maybe even more.
No doubt the South would prevail, with the help of the US and Japan.
But, in the first minutes of an attack, potentially Seoul is destroyed and the DMZ battle zone takes heavy, heavy casualties, the US is a trip wire there.
On the bright side, I doubt there’s going to be an tsunami of PLA soldiers coming over the Yalu this time around.