Minneapolis shooting scene border patrol.

The morning started frigid and quiet on Minneapolis’ “Eat Street,” a stretch of road south of downtown famous for its small coffee shops and restaurants ranging from New American to Vietnamese. But around 9 a.m. Saturday, a federal immigration officer shot and killed a man there, about 1.5 miles from the scene of another fatal shooting of a local woman observing immigration operations earlier this month that sparked outrage and daily protests. And in just over an hour, anger exploded again in the city already on edge, where even before the current immigration enforcement surge networks of thousands of residents had organized to monitor and denounce it.