On the same line of reasoning if Australians were to be Australians or rather if Australians were as separate from any other nation as Australia from any other land there would be no jealousy between them on England's account.
That's one of the reasons I moved to Florida. Of course the main reason is the weather and the training. But there's more jealousy in Switzerland because it's so little and they don't have so many athletes.
My birth neither shook the German Empire nor caused much of an upheaval in the home. It pleased mother caused father a certain amount of pride and my elder brother the usual fraternal jealousy of a hitherto only son.
Religion can make it worse. Are you supposing that if people were encouraged to believe in a transcendent reality and to be encouraged by grand rituals and music and preaching to love their neighbors then they would put jealousy and frustration aside?
I have experienced jealousy possessiveness verbal abuse and violence from men but I have also experienced jealousy possessiveness verbal abuse and violence from women usually when I failed to respond to their advances.