Europeans are beginning to lose patience with Muslim immigration policies and are blaming their governments for bringing trouble into their countries, and are demanding answers following a terrorist attack in London, former U.K. Independence Party leader Nigel Farage said on Thursday.

"People are remarkably calm, given what happened," said the Brexit supporter, now a Fox News commentator, on Fox News' "Fox & Friends" program.

"That, of course, is a good thing. But I really believe that some very searching questions are now being asked."

British Prime Minister Theresa May said Thursday the man who launched the attack was born in Britain and was once investigated by intelligence authorities because of concerns of violent extremism.

However, Farage said the fact remain athat authorities are not cracking down on extremists.

"The population of this country and indeed most of the other EU states, we're now saying to our governments, frankly you have brought this upon us through immigration policies and through not cracking down on extremism that has grown through communities," said Farage.

He pointed to a Chatham House survey that revealed that the majority of respondents in seven out of 10 European countries wanted an end to Muslim immigration.

"I am never advocating that," Farage said. "All I advocate is that we have a proper vetting process. But it shows you that actually the public right across Europe are beginning to lose patience with this."

President Donald Trump, who Farage supports, said Trump likewise was trying to "make America a little bit safer" though his call for extreme vetting and a temporary ban from six Muslim-majority countries, but met with protests.

Farage said there is also an assimilation problem worldwide.

"It's pretty clear that this worldwide PC effort for multiculturalism has failed," said Farage. "What we've done is created these cultural silos in individual communities that have made it easier for people to be radicalized."

Forcing assimilation is not easy, said Farage, but a good start is making sure everyone speaks the same language.

"What needs to happen is that the police and authorities need to stop turning a blind eye," said Farage.