This is very counter to our culture, but no, Christians shouldn’t celebrate diversity for diversity sake. Diversity for diversity sake is empty and void of the Spirit of God.
It’s important that we don’t shame the body of Christ in many places in the world where there isn’t a readily available pool of people with many skin colors and ethnicities, as if most places in the world are like New York City. I’m thinking in particular of the many rural areas of the world where all the skin color for example, will all be very dark, and all the language is all the same. Unity in Christ is always good. Diversity by itself is not. To seek only diversity is to be divisive. The confusion of languages in the world in Genesis 11 was a punishment by God, not a blessing. The beauty of the diversity in the world is not in the diversity itself but the reuniting and unity of humanity amidst the diversity. Stars shine brightly in the darkness, but the celebration is the light not the lack of it. The joy of all the nations worshiping together in Revelation is a reversal of the diversity caused at Babel. We can stand in awe of God’s creativity in the creation of mankind, made in the image of God, with varying degrees of melanin and body shapes and sizes. We can be especially thankful when our churches actually resemble our surrounding communities. But we only stand in awe as we stand together united in Christ. It is otherwise a brokenness. The differences in language and nations in the world only shines bright as we unite under Christ. So no, we don’t simply ever celebrate diversity. For this reason, it’s better to say as Christians we celebrate unity and we celebrate it in our diversity, not simply “unity and diversity.” Diversity divides. Christ unites us as we were once, and as it was intended, as one family, under God. “…he made from one man every nation of mankind to live on all the face of the earth...” (Acts 17:26) What makes all of this more confusing is what some people mean by diversity is actually what the Bible calls sin. So we have to be careful with this word. May we never embrace that kind of diversity.
Therefore remember that at one time you Gentiles in the flesh, called “the uncircumcision” by what is called the circumcision, which is made in the flesh by hands— remember that you were at that time separated from Christ, alienated from the commonwealth of Israel and strangers to the covenants of promise, having no hope and without God in the world. But now in Christ Jesus you who once were far off have been brought near by the blood of Christ. For he himself is our peace, who has made us both one and has broken down in his flesh the dividing wall of hostility by abolishing the law of commandments expressed in ordinances, that he might create in himself one new man in place of the two, so making peace, and might reconcile us both to God in one body through the cross, thereby killing the hostility. And he came and preached peace to you who were far off and peace to those who were near. For through him we both have access in one Spirit to the Father. So then you are no longer strangers and aliens, but you are fellow citizens with the saints and members of the household of God, built on the foundation of the apostles and prophets, Christ Jesus himself being the cornerstone, in whom the whole structure, being joined together, grows into a holy temple in the Lord. (Ephesians 2:11-21)
Adorn the Gospel 