What is so alarming now isn’t that an authoritarian president and a small cadre of right-wing tech executives want to take over. It’s hardly surprising that centi-billionaires like Mark Zuckerberg and Elon Musk would shift the messages in their social media empires to cater to Mr. Trump. What is truly surprising is that everyone else — the same people who once believed in the power of technology to strengthen our society and our democracy — is allowing them to get away with it. The same Silicon Valley leaders who used to trumpet their anti-authoritarian leadership style have gone ominously quiet.