Geeze, people.
Google is your friend.
http://btoellner.typepad.com/kcdogblog/2010/03/the-truth-behind-dogsbiteorg.html
It’s run by a woman who was [allegedly] bit by a Pit and went batshit.
She has slightly more credibility than pETA and HSUS and slightly less objectivity than the DNC.
However, KC Dog Blog - the very same website - makes at least as good an argument that specific breeds, particularly pit bulls with assistance from rottweilers, are the issue when it comes to fatalities by specific breed.
I click in the KC Dog Blog's left hand categories and look up dog bite fatalities for 2009, 2010, 2011, 2012, 2013, and 2014.
This 'dogbite.org has an agenda so trust us instead' website cites approximately 163 fatalities by dog attack since 2009, roughly 85 of which were by pitbull, 4 by "media or authorities called pitbull but at this website we think the dog was mixed", 16 by unknown - and otherwise you're getting many, many by feral packs, 12 Rottweilers, 6 German Shepherds, 8 Bull Mastiffs, 7 Huskys, 8 bulldogs, a Presa Canario, 3 Cane Corsos, a Chow, several Boxers, a mastiff/Rhodesian Ridgeback mix, one(?) retriever/lab mix, . . . any surprises there other than the retriever/lab other than the fact that no Dobermans appeared?