Ricky Shiffer thought he was Ricky Revolutionary. Now, he’s Ricky Rigor Mortis, who died as he lived on social media: pointlessly, fruitlessly, and stupidly. Shiffer is the nincompoop who, enraged by the spectacle of . . . a law-enforcement agency serving a lawful warrant . . . attacked the FBI office in Cincinnati — as everybody knows, the True and Hidden Occult Capital of the Satanic Deep State is somewhere in Cincinnati — Thursday with a rifle and a nail gun. If his posts on Donald Trump’s social-media service are any indicator, he planned the assault poorly, and doesn’t seem...