What makes a person forego his or her regular professional or personal routine in order to stalk federal law enforcement? What makes that person agree to put himself in close proximity to those law enforcement officers, in the freezing cold, even after multiple incidents have resulted in the death of similar activists? It's a question worthy of serious consideration, given that more than 34,000 Minnesotans have joined various agitator groups to learn to be U.S. Immigration and Customs Enforcement "observers."...