HUSBY, Sweden (AP) -- Sweden has long been a bastion of generous social welfare and an egalitarian political culture. So many people were shocked when scores of youths hurled rocks at police and set cars ablaze during rioting in several largely immigrant areas near Stockholm this week. Few dispute that the violence was probably touched off by the fatal police shooting of an elderly man who had locked himself in an apartment wielding a knife. But some residents in the area accused police who responded to the violence of racism. For some, the real reason for the unrest is the...