In 2009: 29,000 white students got the requisite grades for Oxford (AAA excluding General Studies) compared to just 452 black students.
315 black students per year secure A*AA
http://www.admin.cam.ac.uk/offices/admissions/behindtheheadlines/ethnicrepresentation.htmlFor 2009 entry 15.0% of students admitted to University of Cambridge were from Black, Asian and Minority Ethnicity (BAME) backgrounds. According to Office for National Statistics 11.3% of the population of England and Wales in mid-2007 were from BAME backgrounds.
Encouraging students to apply, and to courses other than the most competitive such as Medicine and Law will increase the number attending. You made the leap from the number of black students at Oxford to a series of sweeping statements saying that the problem was that Cambridge are prejudiced against non upper middle class students or that people hold Darwinist views about race & IQ.. It is this sort of ignorant comment that puts people off. So if you care about the problem don't make it worse.