I agree, subhuman nigger blood has got to be the worst.
If one is really concerned they should go spend the $200 on a DNA test before they open their mouth. Last I read on the tests (and it's been a while) after 1/32 all that shows up is a marker on your genome and it can't be told how old it is but it stays there forever. I am sure a lot of people on this board would be in for a surprise or two while veiwing their test results.
And with (standard) niggers you still haven't hit bottom--below even them are the tongue-clicking Bushmen and the Abos/Papuans.
Beneath them, there's probably nothing you could find outside of a fossil.