All true religions, including the Baha’i Faith, teach love. No true religion teaches hatred.
The greatest desire of all the prophets and messengers of God was that love and goodwill should live in the hearts of all humanity. The prophets taught love, encouraged love and modeled love to their followers.
But that love did not last:
The Christian Teaching was illumined by the Divine Sun of Truth, therefore its followers were taught to love all men as brothers to fear nothing, not even death! To love their neighbours as themselves, and to forget their own selfish interests in striving for the greater good of humanity. The grand aim of the religion of Christ was to draw the hearts of all men nearer to God’s effulgent Truth.
If the followers of the Lord Christ had continued to follow out these principles with steadfast faithfulness, there would have been no need for a renewal of the Christian Message, no necessity for a re-awakening of His people, for a great and glorious civilization would now be ruling the world and the Kingdom of Heaven would have come on earth.
But instead of this, what has taken place! Men turned away their faces from following the divinely illuminated precepts of their Master, and winter fell upon the hearts of men. For, as the body of man depends for life upon the rays of the sun, so cannot the celestial virtues grow in the soul without the radiance of the Sun of Truth. – Abdu’l-Baha, Paris Talks, p. 32.
This continual cycle throughout humanity’s history clearly shows us that religion—the Sun of Truth—always needs to be renewed:
The religion of God is one religion, but it must ever be renewed. Moses, for example, was sent forth to man and He established a Law, and the Children of Israel, through that Mosaic Law, were delivered out of their ignorance and came into the light; they were lifted up from their abjectness and attained to a glory that fadeth not. Still, as the long years wore on, that radiance passed by, that splendour set, that bright day turned to night; and once that night grew triply dark, the star of the Messiah dawned, so that again a glory lit the world.
Our meaning is this: the religion of God is one, and it is the educator of humankind, but still, it needs must be made new. When thou dost plant a tree, its height increaseth day by day. It putteth forth blossoms and leaves and luscious fruits. But after a long time, it doth grow old, yielding no fruitage any more. Then doth the Husbandman of Truth take up the seed from that same tree, and plant it in a pure soil; and lo, there standeth the first tree, even as it was before.
Note thou carefully that in this world of being, all things must ever be made new. Look at the material world about thee, see how it hath now been renewed. The thoughts have changed, the ways of life have been revised, the sciences and arts show a new vigour, discoveries and inventions are new, perceptions are new. How then could such a vital power as religion — the guarantor of mankind’s great advances, the very means of attaining everlasting life, the fosterer of infinite excellence, the light of both worlds — not be made new? This would be incompatible with the grace and loving-kindness of the Lord. – Abdu’l-Baha, Selections from the Writings of Abdu’l-Baha, p. 51.
The Baha’i teachings say that every great Faith—the renewal of the Faiths that came before—exists primarily to transmit God’s love to humanity:
All God’s prophets have brought the message of love. None has ever thought that war and hate are good. Every one agrees in saying that love and kindness are best.
Love manifests its reality in deeds, not only in words—these alone are without effect. In order that love may manifest its power there must be an object, an instrument, a motive …
We must find a way of spreading love among the sons of humanity.
Love is unlimited, boundless, infinite! Material things are limited, circumscribed, finite. You cannot adequately express infinite love by limited means.
The perfect love needs an unselfish instrument, absolutely freed from fetters of every kind. The love of family is limited; the tie of blood relationship is not the strongest bond. Frequently members of the same family disagree, and even hate each other …
All these ties of love are imperfect. It is clear that limited material ties are insufficient to adequately express the universal love.
The great unselfish love for humanity is bounded by none of these imperfect, semi-selfish bonds; this is the one perfect love, possible to all mankind, and can only be achieved by the power of the Divine Spirit. No worldly power can accomplish the universal love.
Let all be united in this Divine power of love! Let all strive to grow in the light of the Sun of Truth, and reflecting this luminous love on all men, may their hearts become so united that they may dwell evermore in the radiance of the limitless love. – Abdu’l-Baha, Paris Talks, pp. 35-37.
The writings of Baha’u’llah, Baha’is believe, have the power to spread that light of the Sun of Truth:
They that are endued with sincerity and faithfulness should associate with all the peoples and kindreds of the earth with joy and radiance, inasmuch as consorting with people hath promoted and will continue to promote unity and concord, which in turn are conducive to the maintenance of order in the world and to the regeneration of nations. Blessed are such as hold fast to the cord of kindliness and tender mercy and are free from animosity and hatred. – Tablets of Baha’u’llah, p. 35.
Love accepteth no existence and wisheth no life: He seeth life in death, and in shame seeketh glory. To merit the madness of love, man must abound in sanity; to merit the bonds of the Friend, he must be full of spirit. Blessed the neck that is caught in His noose, happy the head that falleth on the dust in the pathway of His love. Wherefore, O friend, give up thy self that thou mayest find the Peerless One, pass by this mortal earth that thou mayest seek a home in the nest of heaven. Be as naught, if thou wouldst kindle the fire of being and be fit for the pathway of love. – The Seven Valleys, pp. 9-10.