Federal officers in the Minneapolis-area participating in its largest recent US immigration enforcement operation can’t detain or tear gas peaceful protesters who aren’t obstructing authorities, including when these people are observing the agents, a judge in Minnesota ruled Friday.US District Judge Kate Menendez’s ruling addresses a case filed in December on behalf of six Minnesota activists. The six are among the thousands who have been observing the activities of Immigration and Customs Enforcement and Border Patrol officers enforcing the Trump administration’s immigration crackdown in the Minneapolis-St. Paul area since last month.For all the latest headlines follow our Google News channel online or via the app.Federal agents and demonstrators have repeatedly clashed since the crackdown began. The confrontations escalated after an immigration agent fatally shot Renee Good in the head on Jan. 7 as she drove away from a scene in Minneapolis, an incident that was captured on video