

Choosing where to stop providing historical context is a deliberate and political choice. Why stop at 1950 and not at 1948-49 South Korea’s extremely violent repression of South Korean socialists? How about we go five years back to when Korea was colonised by Imperial Japan and liberated by Soviet troops, making locals very prone to being socialist but not being allowed in the south thanks to US support?
Not really. Genocide implies an intent to eliminate a given culture or ethnicity, most wars haven’t had that intention, e.g. most civil wars.