True, but pick any notion and there would be some people who believe that. The question is whether the belief is correct or not. Correctness is hard to determine in the absolutes. It is a skill that adults usually acquire to a lesser or greater degree from experience and corroboration.

Since it's a difficult skill, like it or not the identity of the group espousing the belief does play a role in coloring the credibility. It is one of the multitude of variables by which human's judge potential correctness. My personal coefficient for BBC is higher than most of US cable news (and honestreporting.com as well). The coefficients are issue specific too, though there is a certain issue independent component that different issues inherit from the base.

It so happens that there are issues that I care about, for which there are no US main stream source that has significantly positive coefficient. It is for (not uncommon) situations like this that I need alternative sources like Al Jazeera. In addition to un-affiliated blogs