[DSingularity]

I would argue that unlike your examples — the bank that got robbed; the mosque that got shot up — Facebook perpetrated and facilitated the crime.

A better question would be, should a bank be held liable after being robbed if it failed its duties by designing cheap systems to save money — yes. Should a mosque/church be held liable if they received a threat and they ignored causing large loss of life — yes.

Facebook is culpable. They know the kind of garbage that floats in their platform. They continue to develop their platform and they continue to improve their ad systems. Why won’t they dedicate as much engineering effort to gain an advantage on racism/hate speech/fascism? I’ll tell you why.

Because Zuckerberg simply does not care. He owns the platform that dominates information flows and public discourse. Why would he undermine that?