Last August, outraged conservatives won a one-sided war with Universal Pictures, using social media to get the studio to cancel the autumn release of The Hunt. The action flick, which satirized a physical hunt of “deplorables” orchestrated by wealthy elites — a political version of The Most Dangerous Game — became national news after President Trump tweeted about it, though it was already getting attention online. “Liberal Hollywood is Racist at the highest level, and with great Anger and Hate! They like to call themselves ‘Elite,’ but they are not Elite,” Trump tweeted. “In fact, it is often the people that they so strongly oppose that are actually the Elite. The movie coming out is made in order to inflame and cause chaos. They create their own violence, and then try to blame others. They...