(paraphrasing)

Those who see bias in the media are usually more biased themselves (in the opposite direction)

Example 1. The Philadelphia Inquirer has been accused of having an Anti-Semitic bias by Zionist groups here.
Concurrently it is accused of pro-Israeli bias by Muslim groups.

Example 2. Tom sees the US media as left-leaning (well, OK then, both feet steadfastly planted way to the left).
Tony sees the US media as fairly central, and certainly to the right of him (and pretty much superficial as far as their treatment of news - especially world news - goes).

Of course, we are all right.........

Cheers,
Tony