Way too many good, honorable strong fighting men were pitted against each other in WW1/WW2. So many family lines wiped.

If my intent was to weaken the white race...starting a world war and playing both sides would be a great place to start.

God only knows the genetic/demographic damage from those alone. Now the "leftovers" are pushed through a system that denigrates hardwork, honor, duty and diligence. Then tweak every aspect of the environment(food/water/air/society) to make men more womanly and women more manly...promote societal rot like homosexuality/women's independence/abortion.

Then rinse and repeat for 50 years.

These are your men now.