Risotto Scampi Fra Diavolo

Name: Risotto Scampi Fra Diavolo
Ingredients: 3 cups chicken stock; One 28-ounce can diced tomatoes; 1 pound large shrimp (25/30 count), peeled, deveined, tail on; 5 tablespoons olive oil; 2 teaspoons crushed red pepper flakes, plus more for garnish, optional; Kosher salt and freshly ground black pepper; 1 medium onion, diced; 2 cups arborio rice; 4 cloves garlic, minced; 1/4 cup vodka; 1/2 cup fresh parsley leaves, minced; 2 tablespoons butter; Grilled bread, for serving