This affection we and you owe to each other in a more peculiar way than to people of other races because we worship and confess the same God though in diverse forms and daily praise and adore Him as the creator and ruler of this world. For, in the words of the Apostle, 'He is our peace who hath made both one.'
I don`t think this is doctrinally binding, I'm just saying that the acknowledgement of worship of the same God is part of Catholic Tradition.