Hope Not Hate told HuffPost UK the review was “dangerous”, as a leading equality think-tank said it was “littered with racist tropes”.
Action by equalities watchdog comes a day after a government-backed report claimed institutional racism does not exist in the UK.
Commission on Race and Ethnic Disparities accused of cherry-picking and deliberate misunderstanding as it denies institutional racism.
The report by the Commission on Race and Ethnic Disparities has been described as "deeply worrying" and an "insult".
Controversial review says British schools should teach a “new story” about “the Caribbean experience”.
HuffPost UK and the UK's only race correspondent Nadine White were among those shut out.
Report says universities "perpetuate institutional racism" and calls on governing bodies to make meaningful change.
Research by the Network for Police Monitoring has uncovered evidence of excessive use of force, failures in the duty of care, and racial discrimination.
Tim Davie faced the digital, culture, media and sport committee after HuffPost UK revealed that the corporation had been labelled racist by its own staff.
Diane Abbott is among those to speak out after dozens of staffers revealed a "toxic working environment".