President Barack Obama told world leaders on Thursday that promoting democracy and acceptance of people of all faiths are essential to stopping the spread of violent extremism. "Groups like al Qaeda and [ISIS] peddle the lie that some of our countries are hostile to Muslims. Meanwhile we've also seen, most recently in Europe, arise inexcusable acts of anti-Semitism, or in some cases anti-Muslim sentiment, or anti-immigrant sentiment," Obama said at the closing session of a White House summit on combating extremism. "When people spew hatred towards others because of their faith or because of their faith or because they are...