[JoshTriplett]

Exactly. Also, people have a stronger uncomfortable negative reaction to news they don't like than a positive reaction to news they agree with, and extremists think even neutral descriptions of reality are biased against them, so if you show a neutral selection to a non-neutral person they're likely to see it as biased because it doesn't align with their perception of what the proportions should be. Nobody will ever agree on what "neutral" means, which means most likely it'll mean "biased in favor of who currently has political power".