I realize that, but rational people (if there still are some in S. Korea) would understand that their FEELINGS toward their brothers and sisters in N. Korea should have NOTHING to do with rational policies aimed at preventing N. Korea from repeating its previous lunacies on a more horrific scale. I don't care if they hate them or not.... most Brits before WWII did not 'hate' Germans (nor did most of the countries invaded by Hitler 'hate' all Germans, although there were certainly some animosities). If the 20th century should have taught us anything it's that warm and fuzzy feelings by peace-loving peoples has nothing to do with stopping decisions by depraved dictators to go to war.
I'm not saying that they're justified. That's just how they think. My brother has been pretty much everywhere and he said that they weren't rational in their attitude. They blindly had -what's the word for it?- a sense of brotherhood with them and didn't believe they'd attack or want to fight.
I would imagine a fitting analogy would be to envision an Oklahoma split into two with one half Communist and the otehr half as it is. Both are fellow Americans, you even have plenty of your cousins, school friends, and even your grandparents in the Communist Oklahoma. It would be natural (though not sensible) to believe that if you prod the Communist Oklahoman regime with material aids and encouragements enough, its leaders would be so moved as to abandon the Communist tyranny, and you would have thought the leaders of Communist Oklahoma would be in good faith to transfer all the aids to the ordinary peasants.
Now imagine Britain has security guarantee with the US at non-Communist Oklahoma to help defend it against Communist Oklahoma. The leaders of Communist Oklahoma incessantly broadcasts views that "We are all Americans! The British are stinkin' foreigners!" and some people would start to believe the British aren't their friends and we-should-unite-all-Americans above everyone else.
This sums up the situation in Korean Peninsula is how they come up with the insane aid-the-North programme.