With Trump's latest crime against "the other" - immigrants may have to choose between food and green card - a timely new book considers the threat of a "21st-century master of divisive rhetoric" whose toxic mix of fear, lies, and scapegoating uncannily echos an earlier monster. If you think that's a stretch, see "A Night At the Garden," documenting the 1939 night when 20,000 New Yorkers came to cheer Nazis on - chilling proof "most humans have dark passions inside us, waiting to be stirred up."