She warned that communists, socialists and liberals have "hacked" the system to smuggle in extreme ideas harmful to Western democracies.
Speaking at a conference of rightwingers in the US, the Tory leader used the example of illegal migrant Abdul Shokoor Ezedi.
He converted to Christianity then claimed he would be persecuted if returned to Afghanistan.
Ezedi carried out multiple sex attacks in the UK, threw chemicals over a mother and her two young children in London, then drowned himself.
Mrs Badenoch said: "Over many years, we have had very naive church leaders converting people who had no interest in Christianity as a means to circumvent border control.
"This is what I mean when I say that liberalism has been hacked.
This story is from the {{IssueName}} edition of {{MagazineName}}.
Start your 7-day Magzter GOLD free trial to access thousands of curated premium stories, and 9,000+ magazines and newspapers.
Already a subscriber ? Sign In
This story is from the {{IssueName}} edition of {{MagazineName}}.
Start your 7-day Magzter GOLD free trial to access thousands of curated premium stories, and 9,000+ magazines and newspapers.
Already a subscriber? Sign In
Eddie has know-Howe to keep Isak at Toon
EDDIE HOWE is targeting a Champions League return as he bids to fend off interest in Newcastle's star striker Alexander Isak.
WE'RE ALL IN IT TOGETHER
Unhappy Martinez urges the United players to put some pride back in shirt
Hunt on for one more Mo record
GOALS CHASE MAY YET INSPIRE SALAH TO STAY
JACK UNFAZED BY NEW STATUS
Draper won't lose sleep over filling Murray's big shoes
Bunting is hoping better sleep can also revive Smith
STEPHEN BUNTING says hypnotism saved his career - and now Michael Smith could be heading for the last trance saloon.
IAG shares soar as BA plans £7bn business transformation
ANALYSTS are backing IAG shares next year as the group’s flagship British Airways brand pushes ahead with a £7bn transformation plan.
Veteran survived D-Day to become UK's oldest man
Desert Rat sniper Donald is 110 today
Hero saved lives in Hamas attack unaware his son had been killed
A HERO ambulance volunteer who helped save dozens of wounded victims in the October 7 Hamas attack was unaware his son had been murdered in the assault.
Dementia expert's Christmas advice for family gatherings
A LIFESTYLE expert has compiled a guide for Daily Express readers on how to approach the subject of dementia with children at Christmas.
Keir pledge to Kyiv on training troops
SIR Keir Starmer yesterday spoke to Ukraine's President Volodymyr Zelensky, with the pair agreeing to \"refine\" UK training of Kyiv's armed forces.