The Republican Right's Lies and Propagagnda

I'm posting this article/book excerpt for possible future inclusion in a composition course that would focus on ideology and the media. Not sure whether 'teaching the conflicts' is effective, or if I should simply teach more overtly left-leaning material (say, from The Nation or In These Timesthat provides a more fair and reasonable take on current events than the right-wing propaganda that David Brock once wrote and now wishes to expose in his recent bookThe Republican Noise Machine. The argument against spending time reading material from the far right is that students are already bombarded with the biased bullshit espoused by Rugh Limbaugh, Bill O'Reilly, Ann Coulter, etc. Therefore, time would be better spent reading materials that they are less likely to be exposed to, ideally journalism and academic texts that strive to maintain a sense of professional integrity by being intellectually objective and, if overtly political, then doing so whilst retaining some standard of the objective truth.