The Talmud (the basis of rabbinical law) teaches jews that it is morally acceptable to exploit, steal from, even rape, and murder non-jews. Because, according to jewish law, non-jews are animals, they are subhuman. So when you have a culture that encourages nepotism and malicious behavior towards outsiders it’s no wonder you’re going to make enemies. To argue it’s simply jealousy is extremely dishonest. In fact it places blame on the victim and protects the perpetrator.