The National Diversity Coalition for Trump is not very large, but it is indeed diverse. The group’s Web page features a technicolor photo gallery of men and women from many backgrounds: Vietnamese, Arab, Muslim, Indian, Turkish Cuban and Mexican American — even a Sikh man wearing a turban printed with Donald Trump’s signature slogan, “Make America Great Again.” If such a group’s existence seems improbable given the Republican presidential front-runner’s attacks on undocumented immigrants and Muslims — and his deep unpopularity among women and minorities — Georgia businessman Bruce LeVell believes that is because people don’t really know the man....