People who have a restricted media diet are pretty easy to surprise just by relaying objective information nobody really disputes that their news sources didn't deem newsworthy.
Natural news et al may not be worth paying attention to but foreign propaganda outfits (e.g. Russia today) can sometimes be quite informative if read skeptically, even if only to add context.
Possibly also how sentiments like "facts have a liberal bias" or "liberals live in a fantasy" come about and ring true. The set of facts you use to judge who/what is 'in-frame' are essential to your understanding of the world. Someone else who treats those facts as optional ("Sure they don't believe in global warming, but they understand the issues with immigration") clearly has a poor understanding of "how the world works".
For example, political views from someone who insists that global warming isn't happening are out-of-frame as being factually incorrect. That means a number of right-wing sites are gone, as the insistence that there is no global warming is more of a right-wing conceit than left-wing.
The alternative is not ignoring anyone, regardless of how lunatic they are, which means you admit known nutcases like whale.to and Natural News into your news diet, and that will give you a very warped view of the world.