That is an utter nonsense, apples and oranges comparison. NK is test-exploding H-bombs, test-launching ICBMs, and making overt threats of targeting these on US soil.
What do you think the US response to his violent posturing should be, an invitation to the prom? No, it should be a stern warning that if Kim Jong Nutjob tries to follow through, he WILL be turned into ash.
There is no polite discourse option here. He stops posturing or we start putting up our dukes, too.
If you believe your own rhetoric, then you would do NOTHING (or maybe just say some polite words?) should someone ever threaten to set your house on fire while you slept in it. And somehow I can’t believe that to be the case.