The pork refereed to is that other pork that is really from the beef-lamb tree.
Or as Mel Brooks said in a Hollywood rester.. eatery place.. "Waiter, I will have this steak please...!!"
Waiter " Oh you mean the Pork Chops".. MB "No, I'm jewish I cant eat Pork, but I will have this Steak

".. W.. "Yes sir right away sir..

"