On a recent Friday afternoon, off-duty firefighter Eddie De La Cruz leisurely walks past Bainbridge Avenue along East 196th Street and stops in front of Our Lady of Refuge Church to chat with Father John Jenik, the parish’s longtime leader. They both greet people passing by, mostly parents with their kids, with pleasantries in English and Spanish. The only sense that this interaction is happening in the most dangerous neighborhoods in the 52nd Precinct, and one of the toughest in the northwest Bronx, is a handful of young men wearing hoodies and expensive sneakers milling menacingly in front of a six-story apartment building down the block. They’re on the lookout and waiting to take over these streets when darkness comes.