Whether you talk about a small area or a nation, your neighbors always have multiple reasons to hate you. However, there are some common aspects that all people have in mind while they develop a feeling of hatred for their neighbors. An important reason is the growth and prosperity the other party is experiencing. If your neighbor feels that you have all such amenities that are possessed by a high-status person, they are more likely to be jealous of you. It is the same as if a country hates another country when they develop on a global level more than their neighbors do.
