The former chair of Stonewall, Labour MEP Michael Cashman, says the charity is wrong not to support a boycott of the Brunei-owned Dorchester hotel chain.
Writing for“We only implement actions that we can calculate will have an impact”.
She added: “The boycott could do very real harm to the lesbian, gay, bisexual and trans people of Brunei.”
Stonewall is under increasing pressure to sever its links and join an international boycott of The Dorchester Collection.
Britain’s largest gay rights charity held its annual Equality Dinner at The Dorchester on London’s Park Lane in April.
Tory peer Lord Deben, better known as John Gummer before his 2010 peerage, praised the move.
Labour MEP Michael Cashman, a former chair and co-founder of Stonewall, also criticised Ms Hunt.
Mr Cashman told PinkNews.co.uk: “A boycott is essential. Any connection with the torturous and barbaric Brunei regime is to be vehemently and vigorously resisted.
“Stonewall would ensure that it is consistent in the application of principle and if necessary should hold its annual dinner or awards ceremony in a tent. Infinitely preferable to affording any credibility to the sharia fanatics in Brunei.”
Human rights campaigner Peter Tatchell also expressed his surprise and dismay at Stonewall’s position.
“I’m really surprised and disappointed that Ruth Hunt has taken the decision to not support a boycott of the Dorchester group,” Mr Tatchell told PinkNews.co.uk.
“Nearly everyone else is endorsing it including many straight celebrities.
“I agree with Ruth that dialogue and persuasion are desirable wherever possible. But in this case I seriously doubt that the Sultan of Brunei will be receptive to the rational, compassionate arguments of Stonewall.”