The nation’s fastest-growing gas exporter has leveraged the Iran war and permissive regulations to earn bumper profits. But people in tiny Cameron, Louisiana, say the firm’s operations have upended their lives.By Nicholas KusnetzCAMERON, La.—Sherry Peshoff can see the steel wall from her front door. Her home is lifted 12 feet off the ground to protect it from stormwaters that surge in off the Gulf, but it’s not as high as the wall.