Many harsh words are traded on Twitter each day. Dick Costolo, the former CEO of the company, added some of his own tonight. Costolo was responding to a debate that has consumed tech’s elite on Twitter over the past few days, an argument about whether the industry should actively promote social justice causes and encourage political conversations at work. Costolo’s comments had the effect of dumping a jerrycan’s worth of fuel on the fire. “Me-first capitalists who think you can separate society from business are going to be the first people lined up against the wall and shot in the...