I am not using racism. NK & SK are genetically indistguishable populations.
I am speculating that a smaller nation of starving people with backwards economy and weapons can not successfully invade a larger nation with a well fed, well trained, well armed force.
Remember, the NK would be fighting on SK soil. This is not the same as the USA fighting a war half a world away from its homeland. SK would be defending its homeland, and would likely wipe out those few NK soldiers who did not surrender when offered food.
Not so secret SK weapon: The SuperMarket
Typical South Korean Supermarket
Market prices are too expensive for the average North Korean
Source: http://images.google.com/imgres?imgurl=http://newsimg.bbc.co.uk/media/images/40603000/jpg/_40603152_market_afp203.jpg&imgrefurl=http://news.bbc.co.uk/2/hi/asia-pacific/4072280.stm&h=152&w=203&sz=15&hl=en&start=4&tbnid=AI6i1CiZi2UCpM:&tbnh=79&tbnw=105&prev=/images%3Fq%3Dnorth%2BKorea%2Bmarket%26svnum%3D10%26hl%3Den%26lr%3D%26sa%3DG
Current Events » in reply to Speculation like this often leads to nasty surprises.
I am not suggesting that SK attack NK.