Considering the rule is 50/500, 50 to combat inbreeding and 500 for genetic drift, genetic bottlenecking is unlikely to happen from procreation in one's own race. It is postulated that you would only require 14,000 individuals to progenate humanity on another planet to avert any unforseen catastrophes. So proclaiming the "benefits" of breeding outside one's race is Jewish nonsense. Jews have a plethora of genetic defects and nigger gene expressions are are determinably consistent with low IQ, impulsiveness, and violence. Also when looking at blood and marrow donors, ethnicity is a determining factor in locating a donor as they need to be the same ethnic match as you and it's quite possible neither of your parents in a mixed race baby will be sufficiently close enough to donate.