http://www.tabletmag.com/jewish-life-and-religion/204957/pit-bulls-jews-of-the-canine-world
Here are some select quotes:
PETA’s Ingrid Newkirk contrarily disagrees, saying dismissively that [Jews] are only ... “drug dealers” and “pimps.”
Hitler himself was fascinated with dog breeding—particularly of German shepherds—and of course, passed a ton of laws designed to separate Jews from their own use of animals. He banned both kosher butchery and Jewish possession of pets, what with Jews being inherently cruel. So, Jewish pets were confiscated and put to death, to save them—and to keep Jews’ pets’ impure blood from tainting the blood of good German animals.
Nowadays, people associate pit bulls with thugs. And the word “thug,” as we all know, is barely coded shorthand for a young African-American man. (Truthfully, I’d thought of pit bulls being Jews … but comparing pit bulls to African Americans is even more resonant, in terms of the stereotyping both face.)
Pit Bull contains a black-and-white 2006 photo from the Denver Animal Shelter showing a huge mountain of dog corpses arranged in rows. For a Jew, a black-and-white photo showing mountains of stacked-up dead bodies has one specific resonance. You know what it is.