So, President Donald Trump has been booted off Twitter, as of now forever. Facebook also gave him the heave-ho. Apple and Google, meanwhile, have tossed the riot-friendly Parler app out of their stores.

Parler became a social media cave for the Trump-inspired looters, vandals, cop killers and other social misfits who rampaged through the Capitol. But Amazon may have delivered the harshest blow by refusing to store Parler's data in its cloud-computing service.

Having lost the presidency, the Senate majority and now major platforms for disseminating lies and calls to...