I understand your point, and I do think FB has a social responsibility to cut back on “hate” speech (which is clearly difficult to define). And even though I agree that more people need to open up their minds to different worldviews, I don’t think it’s FB’s responsibility to educate people or burst their bubble. FB is a corporation that provides a social network tool for the purposes of generating income. They are not a classroom or a even news provider, even if a large amount of people take in their own curated (biased?) news from the tool. Facebook only works with what you tell it and offers similar content. They do not (technically) create original content. They do not have any responsibility, social or otherwise, to tell users that their way of thinking is wrong, and there is no business reason for them to do so.