I have come across another article, this one from The Korea Times, that describes Roh's opposition to the use of military force or imposition of sanctions against North Korea. According to the article, Roh stressed the following:
The current standoff over the North's nuclear weapons program should be resolved peacefully through the six-party dialogue. [...] The use of force lacks effectiveness as a negotiation tactic. I believe the United States, which has greatly contributed to the national economic development, will well understand this. [Also, any economic embargo] will only prolong the sense of instability and threat indefinitely.You can access the article here.