Rainforests are disappearing at a frightening rate, the students were taught, so they raised $523 for an activist group’s "protect an acre" program. At the behest of their teacher and the group, they trekked into Manhattan to ask a major bank to "stop lending money to projects that destroy endangered forests and cause global warming." Indoctrination and manipulation are deplorable enough when high school or college students are involved. But these were second graders, and the close cooperation between their teacher and radical environmentalists underscores a widening problem. People want to live in a clean, civil and safe world, activists...