We’ve seen plenty of leftist violence in America in recent times, but we are hardly immune. Across the Pond, in Berlin, Germany, they’re finding out just how damaging crazed anarchists can be when they put their minds to it. To wit, a far-left pro-environmental organization called the Vulkan group claimed responsibility for an attack on the power grid that has left thousands of residents without electricity for days — even as freezing temperatures engulf the region.According to the newspaper Berlin Zeitung, the group posted a 4,163-word letter saying they did it to protest the energy industry, adding that they targeted...