Over the past year, Israel’s slaughter and starvation of Palestinians — funded by U.S. taxpayers and live-streamed on social media — has triggered one of the greatest surges in progressive activism in a generation. Many Americans roused to action by their government’s complicity in Gaza’s destruction have no personal connection to Palestine or Israel. Like many Americans who protested South African apartheid or the Vietnam War, their motive is not ethnic or religious. It is moral.