Six people are arrested as fight breaks out between border security group and International Socialist Organization By Lisa Fernandez MEDIANEWS The national debate on illegal immigration has erupted into fisticuffs and legal trouble in an unlikely seat of political activism: a suburban street corner in Fremont. For three months, a group of seniors, war veterans, blue-collar workers and students has taken to the corner of Fremont Boulevard and Mowry Avenue every other Friday night to decry illegal immigration. But the rallies of the East Bay Coalition for Border Security, as the 30 or so people are called, have drawn ire...