Problems of humanity are caused by considering another person as different from self. The structure of a human being has got different limbs, for different purposes. But those body parts are similarly protected naturally, even though maintained for different functional reasons. The terms like “stranger,” should not exist in the consideration of human existence.
The apparently unsolvable problems are due to failure to understand that when hating another person, one, actually, hates himself. Substantially, one human being is not different from the next one. Physically, a person coming from one location would be viewed as different, by those of another location.
But the Spiritual origin of that person is not described by location. This is just as brothers from the same father protect one another, under normal conditions. Cain killed Abel, probably hoping that his life would be better, without his bother? The reflective answer to the question of murdering his brother was sheer madness.