LONDON (AP) — Thousands of demonstrators gathered in Belfast on Saturday to denounce anti-immigrant rioters who set fire to homes and cars earlier in the week after a brutal stabbing blamed on an asylum seeker.The anti-racism rally came after nights of fiery violence in parts of Northern Ireland following the arrest of a 30-year-old man from Sudan on charges of attempted murder in a stabbing that left a man partly blind.Protests turned violent when groups of masked men set fire to several homes they believed to house immigrants, torched a bus and pelted police with bricks, bottles and firebombs. More...