Schools can't close for every religious holy day, but they can find ways to make sure that students of all faiths and none are treated with fairness and respect.
The Ferguson police search blacks more often even though they are far less likely to be found with contraband than whites. These disparities are typical of vehicle "consent searches" in other jurisdictions.
In other cities — say Boston — police have built and banked some capital of community trust over the years, which can be expended during a crisis or tragedy. In St. Louis, on a hot, August day, the account was empty.
The American political system not only lacks action; it lacks deliberation. On immigration, Obama has provided the first by circumventing the second — and provided a precedent for other presidents to avoid deliberation on other matters.