Cities across the country are on alert today following police warnings of an uptick in "domestic violent extremist messaging" from emboldened neo-Nazi and white supremacist groups who are organizing a "National Day of Hate." Hate groups have been instructed to drop banners, place stickers and flyers, and spread racist and antisemitic graffiti in cities across North America during the last Saturday of Black History Month. The very public displays of hate are being encouraged just as incidents targeting Jewish Americans for harassment and violence have escalated. According to the Jewish media outlet Forward, "A man charged with shooting two Jewish...