ARLINGTON — A University of Texas at Arlington professor who has advocated for illegal immigrants took on a conservative commentator on Friday who argued that immigration of a large number of Hispanics, especially from Mexico, is bad for America. Professor Jose Angel Gutierrez, founder of UT-Arlington’s Center for Mexican-American Studies, and Jared Taylor, editor of American Renaissance, a conservative publication that advocates for Anglos squared off in a campus debate sponsored by the College Republicans. About 375 people who arrived to watch the debate waited to be scanned by police with metal-detecting wands. University spokesman Bob Wright said the extra...