Because this ignorance dignifies itself with the certainty that it alone is capable of understanding and determining what is relevant and important, that it knows me and what makes me tick better than I know myself. I have been fighting such racism for decades. It is harder to wrestle than any madmen who plant bombs. The purpose of racism is to make you compliant, compliant to somebody else's definition of who you should become, how you should behave, what you should think of yourself. The only way to oppose racism, in my opinion, is never, ever to become that thing that British society conceives you to be.
Racist violence is frightening.
From the streets of Hackney to the bomb explosions in Brixton and Brick Lane, there is reason to know the dangers inherent in racism. But British society has little appreciation of the strengths of character rampant racism is building in its minority communities. To exist in the face of danger and insecurity, in the teeth of distaste and incipient racism, and still apply yourself to building a community is a formidable collective act of courage and will. You haven't seen what the Asian and black minorities are truly capable of yet.