Why is moveon.org trying to go after those business who advertise on the Fox news network?

well its official, liberals are afraid of Fox for some reason ( a question i posed a few months ago dealt with their fear) which i do not even understand, after all liberals you do have what Cnn, Msnbc, newspapers, newsweek magazine, time magazine, many college campuses, Abc, Cbs, Pbs, etc, etc, etc, why do liberals feel the need to shut down Fox News when they, the liberals, control about 70-75% of the news media anyway and the recent polls shows that many of the reporters lean toward the Democratic side. so tell me please is having 70% of media on the liberal side still not enough to please liberals. to me, the liberals are becoming more and more like Hugo Chavez of Venezula everyday. comments and answers please