Religious, racial, patriotic and political prejudice must be abandoned,

"According to the teachings of Bahá’u’lláh all religious, racial, patriotic and political prejudice must be abandoned, for these are the destroyers of the real foundation of humanity.
  He has announced that the religion of God is one, for all revelations of it are based upon reality. Abraham summoned the people to reality; Moses proclaimed reality; Christ founded reality. Likewise, all the Prophets were the servants and promulgators of reality. Reality is one and indivisible. Therefore, the prejudices and bigotries which exist today among the religions are not justifiable, inasmuch as they are opposed to reality. All prejudices are against the will and plan of God. Consider, for instance, racial distinction and enmity.
All humanity are the children of God; they belong to the same family, to the same original race. There can be no multiplicity of races, since all are the descendants of Adam. This signifies that racial assumption and distinction are nothing but superstition."

`Abdu'l-Bahá: The Promulgation of Universal Peace P.300