Sorry, could you cite where Google has been caught "spiking stories in their news site that are critical of the left"? I'm deeply interested in censorship and feel that this would be a pretty big story.
How would it be a big story? Fox "spikes" stories that aren't even true, and are critical to the right every day. A lot of it ends up as fodder for the Daily Show.
Because Google's job is to help you find what you are looking for, not provide you with an editorialized curation of information. Fox News, or any other major network for that matter, is not obligated to provide you with unedited information. Their express role is curation.