This one cropped up in the mid 1980s in the UU church all the time but now it's all over and actually so commonly used, it is mainstream. What is "Unity in diversity"? It can be used regarding racial differences but here I am focusing on the religious uses of the term. Basically it is people of different persuasions [religions etc]-- the so called diverse coming into "unity". It is one of the main tenets of Universalism and even of Freemasonry which has held the agenda for centuries for having all religions around one altar. "Unity in diversity" in religious organizations is not only used to promote false ecumenism, but interfaithism as well.
Alice Bailey being a Theosophist [basically out of the foundation of the New Age movement] praised "oneness" or "unity in diversity". She wrote:
"Fundamentalist Christians have great fear of any movement towards world government such as the United Nations or toward "oneness". They see this as the work of the devil...a helpful way for fundamentalists to overcome their fear is to remember the unity in diversity theme, which forms the basis of both the work of the United Nations and the New Age movement--respecting diversity while focusing on the underlying unity"
[quoted in Billy Graham and Friends, Cathy Burns, page 536]
The Catholic church supports it:
Article written by Catholic religious on Unity in Diversity, one world religion concepts included:
I share these personal experiences as apropos to the theme of this talk, ‘Unity in Diversity’, because they illustrate how dialogue arises in even the most casual circumstances. Those engaged in such religious encounters must be alive to the everyday opportunities given them to understand each other’s faith, to discover points of agreement and convergence, and to welcome even the puzzling perceptions requiring further study. When one grasps the truth of some aspect of another faith, one should consider whether it may be just the balance needed to complement a better understanding of one’s own faith.
Pope John Paul II celebrated the concept:
The Holy Father prayed the rosary with thousands of students on hand. The event marked the resumption of his public engagements, after a week of Lenten Spiritual Exercises.
Thousands of youths in Cologne; Krakow, Poland; Fatima, Portugal; Uppsala, Sweden; Bratislava, Slovakia; and Vienna, Austria, heard him live through a television connection.
"Christian young people are called to proclaim their witness to Christ and to be architects of unity in diversity, of freedom in truth and of peace in justice, a peace of which the world is in particular need," he said during his address.
Evangelicals and others are carrying it forth:
"Will the Church Ever Be Able to Find Unity In Diversity?"
Then there is the would-be one world government pushing the theme, with a "world currency coin" minted for G-8 members in 2009:
While the world is gleefully skipping into the false promises of "peace" and pseudo-Utopian visions of peaceful unity: denying the realities of human sin and quests for global power: avoid the "one mind of the beast"! Keep in mind what Jesus Christ taught:
Luke 12:51 Suppose ye that I am come to give peace on earth? I tell you, Nay; but rather division: