The Orlando massacre is sickening and frightening. It's sickening on its face: Dozens of innocent people were shot to death by a remorseless, merciless fanatic on Saturday night, executed for the 'crime' of carousing with friends at an establishment that caters to a clientele despised by their killer. It's frightening because this horror was not perpetrated by masked men shouting slogans in an unfamiliar tongue thousands of miles away. It wasn't carried out by trained practitioners of terror who hijacked airplanes and targeted symbolic nuclei of American power in wealth. No, like last year's San Bernardino bloodbath, this atrocity unfolded...