The Holocaust Educational Trust said they "were lost for words" after Justin Bieber said that he hoped Anne Frank "would have been a Belieber."
More top news
At least 17 people trapped inside an ammunition depot in India when a fire broke out are feared to have died.
Strong winds and rain, heavy at times in the south-east, are forecast for the UK on Tuesday.
The plan to scrap the VAT could save taxpayers £2 billion if Britain left the EU, lead Leave campaigners claim.