Do you have anything to support your implication that MSNBC is as "ideologically biased" (my words, not yours) as Fox News, and thus as worthy of attack for their bias? Consider that, as one example, FNC's VP of News has handed down memos instructing producers to adopt a conservative stance in their stories [1].
[1]: http://mediamatters.org/research/2004/07/14/33-internal-fox-...