The Islamic State is calling for the "slaughter" of U.S. voters on Election Day and demanding Muslims not participate in the democratic process, according to a U.S.-based terrorist monitoring group. Ritz Katz, director of the SITE Intelligence Group, said Saturday on Twitter that the threats appear in an essay carried by the Islamic State's Al Hayat media center that declares militants "have come to slaughter you and smash your ballot boxes." 1)Breaking: #ISIS special Hayat media doc calls for attacks on voters on #ElectionDay demands Muslims not participate in Democratic process pic.twitter.com/w2UKmsQIxo — Rita Katz (@Rita_Katz) November 5, 2016 "May Allah make this year’s U.S. presidential election a dreadful calamity like no other to have struck America throughout its pathetic history,"…