Outrage and calls for Boris Johnson advisor to be sacked for saying 'Very real racial differences in intelligence'

A Number 10 adviser facing growing calls to be sacked over his past remarks also appeared to suggest MPs should pay attention to the "debate" around "very real racial differences in intelligence" when considering immigration controls.

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See this thread. Members of Parliament going ballistic:

'This is what we have come to, and it is sickening'
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Am I missing something? Aren't there charts that prove average IQs are lower in Africa?