Both the Jewish and Muslim religions include restrictions about food, including but not limited to not eating pork. I know very little about Muslim dietary prohibitions, but in Judaism seafood is also forbidden (because bivalves, shrimp etc are scavengers and therefore themselves ate meat, as opposed to being vegetarian like the other animals that are eaten by people).
As I understand it, the practice of not eating meat and dairy together has its roots in the barbaric practice of stewing a newborn calf in its mother's milk.
It's probably true that these prohibitions stemmed from food-bourne diseases like trichinosis, but keeping kosher is now an integral part of Judaic practice. Of course, many people who identify as Jewish are non-observant about these practices, but in my (limited) expereince the same is not true for Muslims.
Hope this helps