Breitbart is a legitimate news agency (you may not like that, but it is). Also, if they left it out lots of people would just howl about how Zuckerberg was catering to liberals. It's as simple as that.
Although I'm much more on the "NYTimes is Truth" side, I read Breitbart daily to gain perspective of what people who voted for Trump think.
Content moderation and factual determination at internet scale in the face of state-sponsored propaganda and multiple divisive nonfactual news agencies is definitely non-trivial. Zuck has started out with a stated philosophy and is attempting to be consistent with it, while also trying to avoid appearance of liberal bias. Some of the consequences of that will not make many people happy.
Although I'm much more on the "NYTimes is Truth" side, I read Breitbart daily to gain perspective of what people who voted for Trump think.
Content moderation and factual determination at internet scale in the face of state-sponsored propaganda and multiple divisive nonfactual news agencies is definitely non-trivial. Zuck has started out with a stated philosophy and is attempting to be consistent with it, while also trying to avoid appearance of liberal bias. Some of the consequences of that will not make many people happy.