Given current events from the past few years, I think it is quite obvious what happens when you sit back. Just how many times do you want to "turn the other cheek"?
Also what are we jumping into? Self defense? Regional peace? what?
I have yet to hear anyone mention peace to nKorea as they constantly break agreements and attack the south. The news does not mention it but there is a firefight on the DMZ frequently, but as soon as we say enough, now everyone wants to talk.
Pres Bush made a statement that I felt was long over due; "you attck us, expect some hard retaliation". (Note: I did not vote for Bush nor am I a supporter). The statement has nKorea along with others second guessing future strategies and running scared.