Ethnic cleansing is the forceable displacement of ethnic-group populations. Deliberately killing members of an ethnic group (or otherwise trying to destroy that group) is genocide, but unfortunately nations and news outlets are shy about using that word, so the overlap has led to confusion of the two terms.

FYI

Thanks, point worth making. My list wasn't meant to be exhaustive. Jewish people had a bad time in that continent long before Nazis as well. Hell even some of the early Crusaders went and committed genocide against Jewish towns in the Rhineland Massacres of the 11th century.

I was just cherry-picking a few obvious genocides to illustrate my point, in case the person above was being serious.