Laura Ingraham appeared on "Fox & Friends" this morning to react to the London terror attack, which left seven people dead and dozens more injured.

British authorities have named Khuram Shazad Butt, 27, Rachid Redouane, 30, and Youssef Zaghba, 22, as the three attackers shot dead by police during Saturday's rampage.

Butt was on authorities' radar and even appeared in a 2016 television documentary called "The Jihadis Next Door."

Ingraham said the number of individuals in the U.K. who have ties to terror groups is "staggering."

"We're not talking about a couple hundred. We're talking about thousands and thousands," she said.

She argued that law enforcement and intelligence officials are simply overwhelmed by the number of people on watch lists and who are labeled "persons of interest."

"That's why it's so important that before you allow people to come into your country that you have a very good sense that they are interested in being part of the British experience, they're not interested in undermining the culture or carrying out horrific attacks," Ingraham said.

She added that it's very difficult to do that thorough vetting with a "mass migration" into Western Europe.

She said that means that innocent people must now "pay a price" for multiculturalism.

"That's what we all have to live with for the free and open society that [London Mayor] Sadiq Khan and all of these other multiculturalists want Britain to become," Ingraham said. "This is the Nirvana they wanted to create, and this is what we have."

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