A shop worker stabbed a colleague for calling him a slave, a Court was told.
Sadiq Salam claimed fellow Sudanese worker Waleed Bashir said people from his region should be wiped out like insects.
Salam told a jury at Lewes Crown Court that he attacked his victim in anger at the Welldone store in North Street, Brighton, with a piece of glass from a broken bottle.
He admits wounding Mr Bashir.
But the 20-year-old, of Charlotte Mews, Kemp Town, Brighton, denies attempted murder, making threats to kill and assault.
The trial continues.
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