1) IQ tests are culturally based. if you have a different culture, you'll score lower
2) there is no such thing as the black race. there are people of African descent, but blacks in the US are a mix of African and European. there is no one characteristic that makes you black. there are fair skinned blacks, and dark skinned non-blacks. same with eyes, nose, lips, hair, etc. There is no characteristic that all blacks have.
3) there are many blacks and many africans with advanced degrees. there are many non-blacks dumber than dirt.
4) that the bell curve of one group of people is different than another group says nothing about genes. It may say something about class, our education system, our health care system, and bigotry.
Put your money where your mouth is.
Would you be willing to bet that we can study 10,000 blacks and 10,000 whites randomly selected from ANYWHERE in the world, whether it be their homelands or elsewhere, and I will bet you that whites score an average of one standard deviation higher than blacks.
In my experience with debate, I have found by now that those opposing my perspective have only a narrow range of stock answers to use.
I'll go through the quotes in bullet point fashion, then present great links where you will find articles from scientists of the calibre of Dawkins to support my points.
CLAIM: "IQ tests are biased towards whites."
REALITY: IQ tests are constructed in such a way as to control for bias, those that are ignorant of psychometric measuring tools are of course also ignorant to such facts. If IQ tests were simply failed by blacks due to bias, then the environment camp should have no problem presenting a biased test where blacks perform better than anyone else. It's never happened, and it's certainly never happened as far as unbiased tests go.
Of course it is a moot point, IQ tests are controlled for such culture bias. They test for everything from spatial ability to reaction times, not "Who was the seventh US President?"