It was racism - Jews first - which made Israel grow from a semi-arid wilderness in a corner of the Ottoman Empire into an agriculturally and industrially advanced state, unlike its backward neighbours. Without racism Anglo-Saxons would have stayed in the miserable swamps of the north west German coast when the Roman Empire was collapsing, and the Welsh would never have ethnically-cleansed the Beaker Folk a thousand years beforehand.
Racism in the days of Empire meant subjugating other people and growing rich on their labour - a wealth which enables us to afford a modern welfare state, unlike the weaker peoples that we conquered. Where slaves were employed we bought them from Arab middlemen - the kind who built the "Zimbabwe" trading fort - thus benefitting both Arabs and members of rival black ethnic groups, who as racists, had captured them in the first place.
So accept racism, because we are ALL racists - even the critics of racism, who put their own race last.