J. Matt Barber, a born-again Christian from Villa Park, hoped to get some reaction in December when he wrote a fiery online essay denouncing same-sex marriage and the "destructive nature ... of the homosexual lifestyle." But the strongest response, Barber said, came from his employers at Allstate Corp. He said two supervisors slapped the article down in front of him, told him he was suspended without pay and had him escorted from the company grounds in Northbrook. "I'm thinking, `What business is this of yours?'" said Barber, 36, who had worked for Allstate for five years, mostly in corporate security....