Boxing hero Amir Khan today accused Shamima Begum of giving British Muslims 'a bad name' as he backed the decision to tear up her passport.
Mr Khan, from Bolton, also blasted the 19-year-old's 'arrogant' and remorseless interviews from Syria where she demanded 'sympathy' from the country she fled aged 15.
He tweeted today: 'You left to support terrorism, now live with it. After watching her video she doesn't seem one bit upset and comes across so arrogant. UK isn't your home, stop giving us all a bad name please'.
Amir Khan, pictured with his wife Faryal Makhdoom, has blasted Shamima Begum and says she should be kept out of Britain for good
Shamima Begum, 19 (pictured before she left the country four years ago) is pleading with the government to allow her back into Britain
Amir Khan did not mince his words when he accused Begum of giving Muslims a bad name
Shamima Begum, who fled the UK to join the Islamic State terror group in Syria aged 15, has been stripped of her British citizenship.
Home Secretary Sajid Javid ordered the move against the 19-year-old Londoner who wants to return to the UK with her newly-born child as the so-called caliphate crumbles.
International law forbids nations from making people stateless by revoking their only citizenship.
Britain appears to believe that Ms Begum, who is of Bangladeshi heritage, holds dual citizenship.
Under the 1981 British Nationality Act, any Briton can be deprived of their citizenship if it is 'conducive to the public good' - and they do not become stateless as a result.
A 2017 government report on the issue said the Home Secretary has the power to 'deprive a person of British citizenship' if it would be 'conducive to the public good'.
However, this only applies if the person would not be left stateless.
If it is the case Ms Begum is a dual national, she could have her British citizenship stripped.
Begum has the right to appeal the decision to the Special Immigration Appeals Commission (SIAC).
The SIAC is independent of the Government and allows individuals to appeal against immigration decisions by the Home Office, such as deportations and the removal of citizenship.
Those who are outside of the UK have 28 days to lodge an appeal from the time they receive their Home Office letter.
Amendments were made to British national laws in 2014 which made it easier to strip dual nationals of their British citizenship.
These measures were primarily aimed at terrorists who could potentially undermine UK security, for example those who fled to Syria to fight and were attempting to return home.
There are two other instances when British citizenship can be removed, which are permissible even if the person would be rendered stateless.
Deprivation of citizenship can be made if a person obtained their citizenship through registration or naturalisation and the Home Secretary is 'satisfied that this was obtained by fraud, false representation or the concealment of a material fact'.
Secondly, when citizenship is obtained through naturalisation and the Home Secretary believes that removing it would be 'conducive to the public good' because the person acted in way which is 'seriously prejudicial to the vital interests of United Kingdom, any of the Islands, or any British overseas territory'.
The news of her lost citizenship was broken to the teenager today, who insisted: 'It's unjust on me and my son. It's a bit upsetting and frustrating. It's kind of heartbreaking to read'.
But she admitted that if Britain won't have her Holland might because she is married to Dutch jihadi Yago Riedijk and said: 'Maybe I can ask for citizenship in Holland. If he gets sent back to prison in Holland I can just wait for him while he is in prison'.
'My family made it sound like it would be a lot easier for me to come back to the UK when I was speaking to them in Baghouz. It's kind of hard to swallow'.
Referring to other returnees handled by the government, she said: 'I heard that other people are being sent back to Britain so I don't know why my case is any different to other people, or is it just because I was on the news four years ago?'
She added: 'Another option I might try with my family is my husband is from Holland and he has family in Holland'.
Amir Khan continues to be outspoken about his faith despite criticism from more conservative Muslims.
In December he was accused of 'disobeying Allah' after he posted a Christmas-themed picture on his Instagram account.
The Bolton-born boxer posted a picture of himself in a Santa hat, with the caption: 'What you all wanting for Christmas?'
But while many fans joked about who they want to see him fight in the New Year, others took exception to the post.
One of his followers, called Wasiafg90, wrote: 'I think you don't know nothing about Islam'
Another commented: 'It's very unfortunate to see that you are waiting for it. Don't you know your are disobeying Allah.'
Other followers told the boxer that Christmas is 'haram', a term meaning forbidden under Islamic law.
But many fans weighed in to defend Khan.
An Instagram user called Sanjar Hussain wrote: 'Guys he's doing this because not all his fans are Muslim.'
Another wrote: 'You don't know Asians who live in Britain. Everyone to a point dabbles in the festivity of the nation they are born in.'
Khan's wife Faryal Makhdoom also came under fire after she posted a photo of her and her husband at an awards event, days after she completed Umrah - the holy Islamic pilgrimage to Mecca.
On that occasion, a critic wrote: 'One day in Allah's house wearing nikab and the next with her legs out.'
Faryal hit back at the comments, slamming those who 'judged' her.
Legal experts including Lord Carlile QC, Britain's former reviewer of terrorism legislation, have said that it appears the Home Office does have a genuine case to revoke her British citizenship and keep her in Syria.
But her newborn son Jerah is entitled to a British passport and could be used by his mother to fight to return to Britain on human rights grounds.
Boxer Amir Khan came under fire from some of his followers after posting this picture online
In November Khan and his wife Faryal Makhdoom completed a pilgrimage to Mecca
Immigration lawyer Asif Salam told the Mirror: 'The baby is British, so maintains his nationality. The child cannot possibly live without his mother, it's not in his best interest for the child to be in the UK without the mother'.
The teenager, who fled Britain with friends aged 15 and married a Dutch jihadi, has been unapologetic about ISIS' crimes and said the Manchester Arena suicide bombing could be considered 'retaliation'.
She also insists that the British public should
