O'Reilly compares liberals to Ted Bundy

What a dumbass.
Not to put to fine a point on it, but I would remind Bill O'Reilly that in this case, at least, serial killers are not necessarily socialists or even moderate Democrats. Ted Bundy was a Republican:

Outwardly, Ted's life in 1969-1972 seemed to be changing for the better. He was more confident, with high hopes for his future. Ted began sending out applications to various law schools, while at the same time he became active in politics. He worked on a campaign to re-elect a Washington governor, a position that allowed Ted to form bonds with politically powerful people in the Republican Party.

But John Wayne Gacy was a Democrat. I guess you can't guess a person's predilections towards serial killing by party affiliation.