Fox News and Fox Entertainment channels are different. They are of course both owned by the same parent company, News Corp, which is owned by Australian Rupert Murdoch.
Here's the easiest I think I can put it.
Fox News is where Republicans in America go to get fed bullshit. Fox and its hosts have been caught repeatedly lying, editing video/photos in misleading ways, leaving out vital information from stories, etc. They sucked George Bush's dick while he was in office no matter what he did, and if Obama adopted ten-thousand kittens and puppies, while solving world hunger, and ending war they would still somehow find something bad to say about him.
Fox Entertainment is primarily for making money. The reason some fairly liberal shows like Family Guy, Fringe, etc. are on that channel is because they make money. If other shows made more money, they would start airing similarly styled shows.
If you want real news in America, NPR isn't a bad bet.