Two recently published articles point up how confused some conservatives are on the issue of illegal immigration from Mexico. Heather Mac Donald's article, "A New Latino Underclass," which appeared in the Dallas Morning News (July 25, 2004), and "A Conservative Manifesto for Solving Border Woes" in The Arizona Republic (Aug. 15, '04) seem to be working at cross purposes. Heather Mac Donald claims that "Hispanic gang violence is spreading across the country," and is "the sign of a new underclass in the making...With gang violence up, social trends down, some fear an immigration influx will overwhelm the tradition of assimilation."...