Facebook and Google broke down barriers to broadcast media – even for mass killers

Early Facebook investor Roger McNamee says the company needs to make fundamental changes. (Dreamstime)

The killing of 49 people at two mosques in Christchurch, New Zealand, was engineered to be viewed and shared on the world's largest technology platforms, taking full advantage of Silicon Valley's laissez-faire approach to content moderation. 

It began with a racist manifesto uploaded to the document-sharing service Scribd and linked on Twitter for anyone to read.