Is it a sin to shop at Wal-Mart?

'This is a movie about American families and American ideals, a movie about one corporation crushing the American dream for millions of ordinary people --- right or left, republican or democrat, red or blue,' he has declared. 'Wal-Mart is systematically destroying the fabric of our nation, pretending to be the great American workplace while at the same time showing thinly veiled contempt for working families, small business owners and the very people it employs.'