1. Humans and other apes are descended from a common ancestor whose population split to become two (and more) lineages. The question is rather like asking, “If many Americans and Australians are descended from Europeans, why are there still Europeans around?” Creationists themselves recognize the invalidity of this claim (AIG n.d.).
Links:
Foley, Jim. 2002. Fossil hominids: Frequently asked questions http://www.talkorigins.org/faqs/homs/faqs.html#apes
References:
1. AIG, n.d. Arguments we think creationists should NOT use. http://www.answersingenesis.org/Home/Area/faq/dont_use.asp#apes
Further Reading:
Darwin, C., 1872. The Origin of Species, London: Senate, chap. 4. http://www.talkorigins.org/faqs/origin/chapter4.html
Source: http://www.talkorigins.org/indexcc/CC/CC150.html
Are you suggesting that the differences between nationalities is analogous to the difference between species? If so, then I'd say you have a very odd understanding of logic. Creationists themselves recognize the invalidity of this claim