Officials from the Home Office suggested that claims of “two-tier policing” are examples of right-wing extremism, according to a leaked review.
Civil servants found that the claim, which was pushed by Elon Musk and other right-wingers after last summer’s riots, was among a litany of “damaging extremist beliefs”.
Other “behaviours and activity of concern” included misogyny, violence against women and girls and having a “fixation on gore and violence without adherence to an extremist ideology”.
The Home Office report also claimed that “right-wing extremists frequently exploit cases of alleged group-based sexual abuse to promote anti-Muslim sentiment as well as anti-government and anti-‘political correctness’ narratives.”
It also recommended going back on the previous Conservative’s government’s move to limit so-called non-crime hate incidents, and floats the idea of creating a new crime of making “harmful communications” online, according to the Policy Exchange think tank, which obtained a copy of the review.
Officials also said that the UK’s approach to extremism should be based on concerning behaviours and activity rather than ideologies.
Home Secretary Yvette Cooper said in August she had directed the Home Office to conduct a “rapid analytical sprint on extremism” to map and monitor trends and inform the Government’s approach.
It also lists “spreading misinformation and conspiracy theories”, “influencing racism and intolerance” and involvement in an “online subculture called the manosphere”.
Paul Stott and Andrew Gilligan, of Policy Exchange, said in an analysis of the report that the suggested approach risks swamping authorities with new cases.
They said: “This new approach risks swamping already stretched counter-extremism interveners and counter-terror police with tens, if not hundreds, of thousands of new cases, making it more likely that dangerous people will be missed.
“Some of the definitions of extremism also threaten free speech, defining aspects of normal and legitimate political debate as extremist.”
The review notes that not all individuals associated with the manosphere promote extreme views and that it is “challenging to identify the extent to which misogyny is explicitly and consciously (or unconsciously) operationalised among violent extremists”, the think tank said.
After Axel Rudakubana, 18, pleaded guilty last week to murdering three girls at a Taylor Swift-themed dance class, Sir Keir Starmer said it was understandable that the public would look at the crime and “wonder what the word terrorism means”.
The Prime Minister said the teenager represented a new kind of threat, distinct from politically or ideologically motivated terrorism, with “acts of extreme violence perpetrated by loners, misfits, young men in their bedroom, accessing all manner of material online, desperate for notoriety”.
He said that if needed, the Government would change the law to recognise the “new and dangerous threat” and “review our entire counter-extremist system to make sure we have what we need to defeat it”.
Rudakubana was referred to the Prevent anti-terror programme three times but those referrals were closed due to his apparent lack of a clear ideology.
The Home Secretary has ordered a review of Prevent’s thresholds in response.
A Home Office spokesperson said: “The counter-extremism sprint sought to comprehensively assess the challenge facing our country and lay the foundations for a new approach to tackling extremism – so we can stop people being drawn towards hateful ideologies.
“This includes tackling Islamism and extreme right-wing ideologies, which are the most prominent today.
“The findings from the sprint have not been formally agreed by ministers and we are considering a wide range of potential next steps arising from that work.”
Shadow home secretary Chris Philp said: “By extending the definition of extremism so widely, the Government risks losing focus on ideologically motivated terrorists who pose the most risk to life.
“In fact, the Shawcross Review of Prevent made clear that counter-extremism and the counterterrorism strategy should be more focused on terrorist ideology, not less.
“Prevent must be equipped to deal with the terrorist threats in our society, and we should not be dialling back efforts to confront this.”
He added: “Other appalling and unacceptable criminal behaviour that is not ideologically motivated – of which there are many kinds – should be dealt with via the police and criminal justice system, and via other agencies such as social services and mental health services, including sectioning those that present a risk.
“Non-crime hate incidents, where there is no imminent risk of criminality, often waste police time and infringe freedom of speech.
“The last government made important changes to ensure that personal data is only recorded and investigations only take place where there is an imminent risk of criminality.”
That was a “sensible approach”, Mr Philp said.
He added: “What the Government seems to be planning is a backwards step in the interests of the political correctness we know Keir Starmer loves.
“Starmer wants the thought police to stop anyone telling uncomfortable truths that he and his left-wing lawyer friends don’t like.”
