I look at it this way: I’m not going to effect a change in anyone’s condition by doing X, Y, or Z “take action” thing (from Oxford, as an academic theologian) right away. I can continue engaging in the political system, work with university life to underscore the devastating folly of uncontrolled gun ownership, and so on. But at this minute, in the face of such catastrophic evil, I can take an action that binds me closer in solidarity with many others around the globe, and that (in the faith by which I live) responds positively to a divine command and orients me toward a radically more benign state of affairs. So I pray.
I get the force of the “don’t pray, do something” admonition — but it relies for its force on the premise that prayer is “doing nothing” (a premise I don’t share), on the premise that I’m trading away a more effectual course of activity (when prayer and activism are not zero-sum alternatives), and on a general resentment of public figures who make much of theological platitudes without directing any of the executive or legislative authority they have toward ameliorating a situation. Is tweeting, “Don’t pray,” an improvement over tweeting, “I’m praying”?