The new mayor of London is angry of Donald Trump's views on Islam, describing it as "ignorant".
Sadiq Khan, who is now the first Muslim mayor of any Western capital after winning the election in London, made the comments Tuesday after Trump suggested the Londoner would be allowed to enter the U.S. despite the proposed ban on Muslims entering the United States.
"Donald Trump's ignorant view of Islam could make both our countries less safe -- it risks alienating mainstream Muslims around the world and plays into the hands of the extremists," Khan said.
He rejected Trump's suggestion that he could be an exception to the proposed Muslim travel ban, saying: "This isn't just about me - it's about my friends, my family and everyone who comes from a background similar to mine, anywhere in the world."
The statement continued: "Donald Trump and those around him think that western liberal values are incompatible with mainstream Islam -- London has proved him wrong."
Trump, the presumptive Republican presidential nominee, told the New York Times Monday that he was "happy" that Khan had been elected mayor of London.
Asked by the newspaper how his proposed temporary ban on Muslims entering the country would affect Khan, Trump replied: "There will always be exceptions."
Trump sparked controversy when he called for "a total and complete shutdown of Muslims entering the United States until our country's representatives can figure out what is going on" in the wake of the Paris terror attacks in November.
If Trump won the U.S. election, Khan said, "I'll be stopped from going there by virtue of my faith, which means I can't engage with American mayors and swap ideas.
Conservative tacticians thought those sorts of tactics would win London and they were wrong. I'm confident that Donald Trump's approach to politics won't win in America."
Trump's comments about Islam on the campaign trail - including proposing the creation of a database for Muslims, and claiming that Britain has a "massive Muslim problem" - provoked a heated response in the United States and abroad.
In the UK, a public petition to ban Trump from the country for hate speech attracted more than half a million signatures. The petition prompted British parliamentarians to hold a non-binding debate on the issue in January, with one MP opining: "I don't think Donald Trump should be allowed within 1,000 miles of our shore."