By The editorial board
In the space of less than a week, America has suffered the worst anti-Semitic attack in its history — a massacre that claimed 11 lives — and uncovered a spate of pipe bombs mailed to at least 14 of President Donald Trump’s critics, including his predecessor, Barack Obama. In a third incident, two African-Americans were gunned down in a grocery store. The alleged killer spared a white customer, saying “whites don’t kill whites”. The apparent culprits in the first two — Cesar Sayoc, who allegedly posted the pipe bombs, and Robert Bowers, accused of gunning down worshippers and police officers in a Pittsburgh synagogue— were inspired, in part, by conspiracies on social media touting Mr Trump’s story of a caravan of central Americans heading towards the US border. Anti-Semites believe the caravan is funded by George Soros, the hedge fund billionaire, who was one of the pipe bomb targets.As president, Mr Trump’s first duty should have been to appeal to national unity. Instead, he used it as a chance to sow more division. He endorsed the idea that the pipe bombs were “false flag” operations by Democrats fearful of losing next week’s midterm elections. “Republicans are doing so well in early voting and now this ‘Bomb’ stuff happens and the momentum greatly slows,” he tweeted. Although he condemned anti-Semitism, his response to the Pittsburgh massacre was no less inappropriate. He said the Tree of Life synagogue should have had an armed guard. These were highly incendiary responses, which gave Mr Trump cover to downplay any future violent attempts against his critics.