Sorry to interrupt your prose exposition, but one quick question. Would you consider dark white on light black crime as intraracial?
Sorry to interrupt your idiotic word vomit, but one quick question. Are you making the scientifically indefensible assertion that "race" is nothing more than "skin color"?
No, I would not consider "dark white" on "light black" crime to be intraracial as they would be members of different racial groups, regardless of their skin color. This is because of the scientific fact that race is not merely skin color. Ok, your turn.
Evolutionary biology, genomics, bioinformatics, genetic markers, haplogroups, autosomal DNA, physical appearance, common sense, in no particular order.
Ahh, ok, we'd use a blood test to figure it out. You posted a bit re WWI... we probably wouldn't need a blood test to decide whether the English and the Germans, slaughtering each other by the tens of thousands in a single day, were interracial or intraracial combatants, would we? It's pretty clear.