Fox Host Bill O’Reilly downplayed the dangers of anti-abortion attacks claiming he was unable to remember the last time an abortion clinic was attacked by right-wing extremists, ignoring the long history of attacks against abortion clinics.

On the June 21 edition of Fox News’ The O’Reilly Factor, O’Reilly argued with contributor Kirsten Powers over remarks made by CNN’s Van Jones claiming that “young white” right-wing extremists are seven times more likely to kill an American citizen than Muslim terrorists. During his discussion with Powers, O’Reilly dismissed the prevalence of right-wing Christian attacks by asking, “When is the last time a Christian blew up an abortion clinic?”

The National Abortion Federation reports there have been 42 documented cases of bombing or attempted bombings of abortion clinics since 1977. Most recently, in 2005 a man confessed to two deadly bombings at women’s clinics in Georgia and Alabama. After pleading guilty to the crimes, he told the court “abortion is murder.”

From 1977-2014, 6,948 incidents of violence have been reported at abortion clinics, including the Nov. 27 deadly shooting at a Colorado Planned Parenthood clinic that was inspired by false claims that alleged the network of clinics illegally sold “baby parts.”

Reproductive health clinics have faced a surge of violent threats following conservative media’s wave of anti-abortion attacks that tailed the release of the deceptive video that inspired the Colorado shooter.