To fine-tune Nicholas Kristof’s imaginary scenario (NYT Opinion, June 3):

Were British Columbia intent on killing Americans and dispossessing our country’s population, and had weapons that could reach Washington and New York, and, after the U.S. prevented war-grade material to reach the province (without impeding humanitarian aid), the Canadian province launched 4000 missiles at Seattle and San Francisco, I think most of us would be in favor of doing anything necessary to degrade its ability to do more of the same.