Add the olive oil, garlic and tomato paste to a pan over medium heat. Cook, stirring, until the garlic is just starting to turn golden at the edges. Stir in the Calabrian peppers and cook for 1 more minute. Add the wine and stir, scraping up any brown bits in the pan.
Turn the heat to medium low and add the tomatoes. Fill the tomato can halfway with water, swish, and add the tomato water to the pan. Season with salt. Let the sauce simmer, stirring occasionally for about 10 minutes, or until the sauce has thickened slightly and the flavors have melded.
Just before the pasta is done cooking, gently stir the crab into the sauce, making sure not to break up the lumps too much.
Meanwhile, bring a large pot of water to a boil. Once the water is boiling, season with salt. Add the pasta and cook to 2 minutes less than the package directions for al dente. Reserve 1 cup of pasta cooking water and drain.
Add the pasta, butter and parsley to the sauce pan and toss to coat. Let the pasta finish cooking in the pan, adding pasta water as needed to loosen the sauce.
Divide the pasta between bowls and top with the fried breadcrumbs. Enjoy!