Social/political commentary can be a tricky thing to explore in movies. Done with some skill, horror can be the perfect genre to explore it. They tend to “get away” with more within the safe confines of a genre movie. The first Purge movie was a terrific premise in search of a movie. It was an instant hit, while becoming almost universally hated by audiences who felt they were victims of an elaborate bait and switch. The Purge was basically a home invasion thriller with a cool, sci-fi premise used at times, as little more than window dressing. The Purge: Anarchy blessed …