Every day is a Charlottesville now, but hardly anyone notices. The small central Virginia city is a metonymy for the 2017 white nationalist “Unite the Right” rally that created national shock waves and rocked the presidency of Donald J. Trump. The antisemitic rhetoric and menacing nature of that event — in a different, left-wing form — are being replicated all over the country in openly hateful pro-Hamas protests. Outside the White House last weekend, anti-Israel protesters wore terrorist headbands; chanted for Hamas and Hezbollah to “kill another solider now” and “kill another Zionist now”; held up signs urging another “intifada,”...