Answer:
They do this because there is a tradition that the animal you eat will affect your personality. A cow is peaceful and content, so it is good to eat. A pig is gluttonous and messy, so they dont eat it.
Step-by-step explanation:
As ridiculous as this sounds, there are studies that prove nowadays that subconsciously, ppl are affected by what they eat.People who eat more red meat are generally more aggressive. The Jews were ahead of their time.