Bill O'Reilly has joined Donald Trump's campaign to demonize immigrants and to make sure that no Hispanic person ever again votes Republican. I have Liberal friends who are not displeased by this because they believe analysts who say it's mathematically impossible for any G.O.P. nominee to win the White House without substantially improving on how Romney did with Hispanics. It's puzzling to hear loud voices in the party treating them as rapists and the source of all crime. Matt Taibbi has more.