Heat the oil in a large pot or Dutch oven over medium heat. Add the onions and bell peppers, and cook for 5 minutes.
Add the garlic, chili powder, cumin, salt, pepper, red pepper flakes, paprika, and oregano to the pot. Cook for 1 minute more.
Add in the ground turkey, breaking it up with a spoon. Cook for 5 to 7 minutes, until the turkey is cooked through.
Stir in the tomatoes, kidney beans, and black beans. Bring the chili to a simmer, and cook for 20 minutes or until thickened.
Add parsley just before serving. You can also serve it with shredded cheese, sour cream, and diced onions as desired.