Spicy Tomato and Watermelon Gazpacho with Crab

Name: Spicy Tomato-and-Watermelon Gazpacho with Crab
Ingredients: 1 habanero chile, preferably red; 4 cups seedless watermelon chunks (1 1/2 pounds); 1 large garlic clove, mashed to a paste; 2 pounds tomatoes, cored; 2 tablespoons red wine vinegar; Salt; 1/4 cup freshly squeezed lemon juice; 1/4 cup buttermilk; 1/4 cup extra-virgin olive oil; 1 pound jumbo lump crab, picked over; 2 small Hass avocados, cut into 1/2-inch dice; 1 large poblano, finely diced