If the DNA matches, yeah. And you say that lime white people (or any race, really) don't kill each other over dumb stuff.
And time wise, it's closer to being backwards. People tried to establish why black people and whites (and other races) were different to help as an excuse why treating them as subhuman was acceptable. Racists on both sides still use similar excuses. Now granted he could be talking about a more modern timescale, but certainly seems like he's talking about a long time ago.