With more than 100,000 persons set to gather at the National Mall today to demonstrate solidarity with Israel, the thing to keep an eye on is the flags. We imagine that the Stars and Stripes and Stars of David will flutter as far as the eye can see. The confluence is no coincidence. That point was in sharp relief over the weekend, where an anti-Israel protester in New York tore down the flag at the corner of Lexington and East 43rd Street — on Veterans Day no less.