This central theme was emphasized directly by the wisdom teachers in each and every religion. Jesus instructed his followers not only to love those who loved them but also those who did not. Mohammed stated that we not only do good to those who do good to us, but also to those who oppress us. Vyasa, in the Hindus scriptures, insisted that all people should love friend and foe alike.
The wisdom teachers of every religion have seen the consequences, potentiality, and possibilities of loving without regard to relationship. They have realized that disagreements and animosities between people are symptoms of deeper, underlying problems. Without the awareness of Oneness and Unity of all people, even petty grievances can escalate into confrontations, and the resolution of minor differences can be an endless task. One problem leads to another, and all difficulties become so seemingly interwoven that resolution becomes impossible.
Oppression will never end by opposing it with oppression. War will never stop by warring against it.
The teachings of the world's religions are very clear only this point: Only by becoming aware of our commonalities can we evolve beyond the limited vision that results in conflict. Only by becoming aware of the divinity within all individuals - within every person - can the basis of lasting peace and harmony be established.
If your enemy is hungry, give him bread to eat, and if he is thirsty, give him water to drink - Judaism
Conquer one who never gives with gifts; subdue untruthful individuals with truthfulness; vanquish the angry with gentleness; and overcome evil with goodness. - Hinduism
Love your enemies, do good to those that hate you. - Christianity
Do not say that if people are good to us, we will do good to them. If people oppress us, we will oppress them. Determine that if people do good to you, you will do good to them, and if they oppress you, you will not oppress them. - Islam
Confucius was asked, "What do you say of the remark, 'Repay enmity with kindness?'" And he replied, "How then will you repay kindness? Repay kindness with kindness and enmity with justice."