The new, conservative South Korean government took a tougher line on North Korea, warning that it would speak out against human rights abuses in the Communist North and that it would not expand economic ties unless the North abandoned its nuclear weapons programs.
North Korea furiously reacted to this policy by banishing 11 South Korean officials from Kaesong joint industrial complex.
It seems to me that North-South relations will be cooled down for the time being.
Such a strong reaction from DPRK can be understood as training and pressure against South Korea. That psychology was based on Lee's rigid standpoint toward North Korea. In other words, the tug of war between North Korea and South Korea government has started over the taming the other half of brothren.