My comment is mainly in that "conservative news" makes money... a large portion of the population is conservative, and was under-served by the commentary from other news outlets. Now I think it's too far the other way, but businesses are, and should be allowed to adapt or die.
I would presume that a lot of people in the media may or may not believe what they are spewing... as for the management/administration of Fox News, I would say it's likely more about money than political views.