Whatever your alignment in the political spectrum, it's important to understand satire and to properly identify where you get your information and propaganda from. After all, you don't want to be one of those people ranting and raving about something you read in The Onion.
You also don't want to be the conservative National Liberty Foundation who found this image from Bioshock Infinite and decided to put it on their Facebook as though it was backing up their viewpoint. Unsurprisingly, when fans of the game got wind of this, they quickly started flocking to the group's Facebook page to start putting up sarcastic mocking comments pointing out how satirical and obviously racist the picture was intended to be (the entire goal of this artwork is to make you hate the villains in the game).
Since then, the group took down the post and has claimed they put it up on purpose as a promotion to inflame trolls to start advertising their group for them. While I doubt that was the original point, either way, it is true. Nothing gets you noticed more on the internet than a stupid political faux pas -especially when it includes a geeky pop culture reference.