Commentary: ‘Never again’ means nothing if Holocaust analogies are always off limits

The Holocaust was suddenly in the center of U.S. political discourse early this week. Rep. Alexandria Ocasio-Cortez, D-N.Y., referred to U.S. Customs and Border Protection (CBP) detention centers as concentration camps on social media, which provoked a backlash from conservatives and then a flood of support from progressives. And #Kristallnacht trended on Twitter on Monday night after President Donald Trump tweeted that U.S. Immigration and Customs Enforcement (ICE) will soon step up its work "r