The controversial 69-year-old US Republican presidential candidate also refused to back down in his ongoing verbal spat with British politicians.
Earlier this week he claimed that parts of London were so radicalised that police refused to enter. Scotland Yard refuted the claim but some officers later came forward to confirm their fears of terrorism.
Mr Trump has called for a ban on all Muslims entering the US in the wake of the San Benardino shooting massacre in southern California in which 14 people died at the hands of killers inspired by Islamic extremists.
Mr Trump’s claim that more Muslims join ISIS than the British army came in a Twitter post.
The billionaire tycoon tweeted a link to a magazine article that referenced the claim, which was based on figures from England’s first Muslim MP.
UK politicians should be thanking meDonald Trump Khalid Mahmood, the Labour MP for Birmingham Perry Barr, said in August 2014 that there were about 2,000 British jihadis – a higher number than the Government’s estimate.
And this figure was then compared to Ministry of Defence data showing there were about 600 British Muslims in the Armed Forces at the time – just 0.4 per cent of total personnel.
MPs lined up to criticise Mr Trump and called him a ‘hate preacher’ and ‘dangerous demagogue’ who should be banned from Britain.
But in a series of outbursts, he hit back: “UK politicians should be thanking me” for the claim that some of the country’s Muslim communities are no-go areas because of extremism.
He added: “Government elites continue to be out of touch with the facts on the ground. Great leaders listen to and support law enforcement officials – they don’t bury their head in the sand.”
He also attacked “out of touch” MPs who abused him over his demand for an end to Muslim immigration to America, tweeting: ‘Everybody is wise to what is happening, very sad! Be honest!’
The petition to ban him from the UK has reached 525,000 signatures but Mr Trump again hit back on Twitter: ‘They don’t know what they’re getting into.’
Prime Minister David Cameron has called Mr Trump’s proposal to ban Muslims “divisive, unhelpful and quite simply wrong.”
Boris Johnson, Mayor of London, said “the only reason I wouldn’t go to certain parts of New York is the real risk of meeting Donald Trump”.