I am extremely biased. I have an entire world view and like everyone else I tend to believe things that concur with what I already believe and reject things that are inconsistent correctly or incorrectly. For instance rejection of "mainstream media" is often correlated not with thoughtful analysis but rather with blatant anti-intellectualism common among right wingers.
Asking "are you a dumb conservative bigot" is offensive and shuts down dialogue even when the person wasn't. Better to ask for the fellow to expand on their comment