The slightly fetid “phony war” in Ukraine—the unsettling stagnation noted in this space a month ago—is emphatically over. Suddenly there is movement on several fronts, and some of it is promising. But this is a dangerous moment, too, chiefly because Washington’s bet on the post-coup government in Kiev, bad from the outset, is on the brink of producing a result so ugly and shameful its consequences all around cannot now be calculated.