O'Reilly is a self-righteous blue-collar-wannabe who really hasn't had an original thought in his life. I don't know how this myth that he is some conservative thinker got started. I seem to recall that one night, debating some lesbian kiss-in at a WNBA game in New York, O'R compared his suffering as a controversial talk show host, always facing criticism from his ideological opponents, to the plight of gays and lesbians. He's not complaining - why should the gays? If O'R supports gay adoption, it's probably for incredibly stupid reasons.
Here's a great column on O'R, but Michael Kinsley, whose very existence forces me to retract my statement that there are no funny liberals:
O'Reilly Among the Snobs