Pride Month kicks off in Boston on Tuesday with a lights event, a paint night — and preparations for a possible “Straight Pride Parade” this summer. The event to celebrate heterosexuality in one of the nation’s most gay-friendly cities is meant to poke fun at the “identity politics” of the political left, organizer Mark Sahady wrote in a Facebook comment. The parade organizers have designed a flag and designated actor Brad Pitt as their “mascot.” “For them everything is based upon identity and whether or not one is categorized as a victim or an oppressor,” Sahady wrote on Facebook. “If...