You miss one important fact. Western racism has been a lot more successful and genocidal than eastern racism. No one can deny that there is discrimination in every place. But you would be hard pressed to argue that the Jews have treated Germans or Americans or Canadians as badly as they were treated.

The British weren't just massive slavers. They instituted legal segregation, that was in effect in South Africa till 1994 and Hong Kong till 1997. Their ex-colony, the USA, had legal segregation till 1965. 

In fact, the minorities in the USA weren't allowed to vote till 1965. The Hong Kong Chinese were not allowed to vote till 1993. No senior government position in Hing Kong could be held by a Chinese person till the 1990s.