The racist part is thinking that the confucianist misogynistic hyper capitalistic culture is worth protecting in the first place, as if Bangladeshi, Indonesian or Filipino people living in the same country as you will somehow be the thing that is the end of "Koreanness" and not all of the culture's inherent issues itself- the other kind of end of Koreanness (the implied preferred end) is when almost everyone who is Korean dies out. (Which, to be clear, is not limited to Korea- it's the same set of issues everywhere people complain about "immigrants")