The US government is very good with that variety of math. Through starvation, disease and other mistreatment, Indians were systematically eliminated for generations.
The propaganda machine must first isolate the intended group, show examples of behavior contrary to popular belief and motivate the masses to destroy. The hatred must be so great that any hostile action is acceptable.
WWII produced some perfect examples. Allied bombing accomplished the same results as Nazi concentration camps on a much larger scale .
The goat humpers are way ahead of us.
rno