Combine sour cream, 1/8 teaspoon salt, and chile; set aside. Combine 1/2 cup onion and 1/2 cup tomato; set aside.
Melt butter in a large nonstick skillet over medium heat. Add 1 cup onion, 1 cup tomato, cumin, 1/2 teaspoon salt, cinnamon, and minced garlic; cook 5 minutes, stirring frequently. Stir in cilantro. Arrange fish over onion mixture in pan; cover and cook 3 minutes. Turn fish; cover and cook 2 minutes. Break fish into chunks. Stir in rind and juice; cook 2 minutes. Remove from heat.
Warm tortillas according to package directions. Fill each tortilla with 1/2 cup fish mixture and 1/4 cup reserved onion mixture; top each serving with 2 tablespoons chipotle cream. Fold in half or roll up.