Amnesty foes respond WE REPRESENT MAINSTREAM, ACTIVISTS SAY By Jessie Mangaliman Mercury News Watching massive marches across the country calling for a path to legalization for undocumented immigrants, Roberta Allen felt her anger slowly rising. ``They have a lot of gall coming here and demanding rights that aren't theirs to have,'' said Allen, 62, a San Jose small-business owner. ``I've no problem with legal immigrants. It's illegal aliens I have a problem with.'' Allen refers to her point of view as ``the other side'' in the debate over immigration reform. After ceding the spotlight in recent days and weeks to...