Did I say we should "roll over and die?   There is a big difference between that and simply not responding in kind to a crazy person.   There is virtue in not pushing the issue until you are sure of a likely outcome.   Escalating tension is never a good idea without a good plan for managing a likely response.   Or are you advocating for military action without a plan for a counter attack?   Are you naive enough to think we can knock out the north korean military completely without them being able to attack south korea?   Is that YOUR solution???