When the internet was switched on, we were told this was the dawn of the information age. Turns out it was the birth of the disinformation age. There have been efforts to rein in the hate content on social media, but it has failed to stop extremists. Has online hate radicalized America and broken our political system? How can we fix it?Tamar Mitts is the author of "Safe Havens for Hate: The Challenge of Moderating Online Extremism."