British police say it was an “error of judgment” to include environmental protest group Extinction Rebellion in an official document that listed extremist organizations. The counterterrorism police unit for southeast England included the climate change protesters alongside Islamic extremists and banned neo-Nazi group National Action in a guide to “safeguarding young people and adults from ideological extremism,” The Guardian newspaper reported. The guide said that “while concern about climate change is not in itself extreme, activists may encourage vulnerable people to perform acts of violence.” …