“Will we ever be able to have a constructive conversation on the [gun] issue?” Joanna Weiss asked Sunday in her “Gun Debate Hate” column in The Boston Globe. She was referring to reports from the week before about a Swamspcott selectman seeking authority for police to enforce Massachusetts state law requiring gun owners to keep firearms in their homes locked up. “Here’s a summary of what happened, as far as I can gather, at last week’s meeting of the Swampscott Board of Selectmen,” Weiss wrote, decrying “the Internet Instant Outrage Machine [that] rained down on Barry Greenfield, the selectman who...