Jawohl, Mein Fuhrer!

Wow, Hitler, you're book, Mein Kampf is so enthralling. Your statements are so valid, they must be true. Hey, let's all follow you on towards world domination because we are all gullible human beings who need to be told that our blood is superior and the Jews are not, and that they are just lowly animals.

Oh wait, except you forgot for one thing Dummy Hitler.

Species does not equal race.

"Any crossing of two beings not at exactly the same level produces a medium between the level of the two parents. This means: the offspring will probably stand higher than the racially lower parent, but not as high as the higher one. Consequently, it will later succumb in the struggle against the higher level. Such mating is contrary to the will of Nature for a higher breeding of all life. The precondition for this does not lie in associating superior and inferior, but in the total victory of the former. The stronger must dominate and not blend with the weaker, thus sacrificing his own greatness. Only the born weakling can view this as cruel, but he after all is only a weak and limited man; for if this law did not prevail, any conceivable higher development of organic living beings would be unthinkable."

You sir, are a dumbass.

Humans are humans. We are all one species. If we intermingle, so what? You're argument convinces us that by having babies interracially, it is seen as just as bad in Nature's eyes as having babies interspecies. That is entirely not true. Nature ensures that interspecies-bred animals cannot reproduce (the mule, the liger, etc.) Nature doesn't ensure interracial humans cannot reproduce, it allows us to do so. That right there automatically should show solid evidence against your case that Nature has no problem with us intermingling. This just doesn't hold up under any scrutiny.