NEW ORLEANS — As the church bells rang marking the decade since Hurricane Katrina struck the Gulf Coast, the 80-year-old woman leaning against her rusting Oldsmobile wept softly into a tissue. “I feel guilty,” said Eloise Allen, whose house was damaged but inhabitable after the storm. “I didn’t go through what all the other people did.” Saturday was a day to remember what “all the other people” went through.