Fear shuts down our ability to reason and make good decisions. When we act in fear, we act irrationally, and often violently, perpetuating a fear-violence feedback loop.
Cultivating a kind and generous attitude toward others puts us in a position of strength, opens us to receive kindness, and encourages kindness in others.
"Individuals" are functional systems connected through larger order systems. This is the metaphysics behind "Do unto others as you would have them do unto you," "What goes around comes around," and "in the end, the love you take is equal to the love you make." All true.