IN THE BLOOD? The Santa Ana pro-war rally Tuesday was organized by a talk show host (B1), but anti-war forces at UC Irvine were put together by a sophomore for whom such protests seem to run in the family: 20-year-old Joshua Nave. . . . His parents met at the 1968 Democratic Convention in Chicago, site of bloody battles between anti-war protesters and police, and his father burned his own draft card in a symbolic gesture against the Vietnam War. . . . Father and son disagree about this war, but “I know my dad supports me,” he says.