Via this Salon article, which notes:
… Tiller’s name first appeared on “The Factor” on Feb. 25, 2005. Since then, O’Reilly and his guest hosts have brought up the doctor on 28 more episodes, including as recently as April 27 of this year. Almost invariably, Tiller is described as “Tiller the Baby Killer.”
Tiller, O’Reilly likes to say, “destroys fetuses for just about any reason right up until the birth date for $5,000.” He’s guilty of “Nazi stuff,” said O’Reilly on June 8, 2005; a moral equivalent to NAMBLA and al-Qaida, he suggested on March 15, 2006. “This is the kind of stuff happened in Mao’s China, Hitler’s Germany, Stalin’s Soviet Union,” said O’Reilly on Nov. 9, 2006. …
… O’Reilly’s language describing Tiller, and accusing the state and its elites of complicity in his actions, could become extremely vivid. On June 12, 2007, he said, “Yes, I think we all know what this is. And if the state of Kansas doesn’t stop this man, then anybody who prevents that from happening has blood on their hands as the governor does right now, Governor Sebelius.”
Three days later, he added, “No question Dr. Tiller has blood on his hands. But now so does Governor Sebelius. She is not fit to serve. Nor is any Kansas politician who supports Tiller’s business of destruction. I wouldn’t want to be these people if there is a Judgment Day. I just — you know … Kansas is a great state, but this is a disgrace upon everyone who lives in Kansas. Is it not?”
This characterization of Tiller fits exactly into ancient conservative, paranoid stories: a decadent, permissive and callous elite tolerates moral monstrosities that every common-sense citizen just knows to be awful. Conspiring against our folk wisdom, O’Reilly says, the sophisticates have shielded Tiller from the appropriate, legal consequences for his deeds. It’s left to “judgment day” to give him what’s coming.
O’Reilly didn’t tell anyone to do anything violent, but he did put Tiller in the public eye, and help make him the focus of a movement with a history of violence against exactly these kinds of targets (including Tiller himself, who had already been shot). In those circumstances, flinging around words like “blood on their hands,” “pardon,” “country club” and “judgment day” was sensationally irresponsible.