You asked, "Have you found this to be true? How can we make this happen?".
What exactly are you trying to make happen? It's been true. It already is.
What the spirit is saying is, the moment you accept Jesus Christ as your Lord and Savior, what you used to be doesn't matter any more.
In the physical, the world may classify you as a(n) Jew, Greek, African-American, Latino, Indian, Arab, Black, White, Male, Female, Wife, Husband, Master, Servant, Rich or Poor. But in God's eye, in the spirit, you are His dear child. No separation. No division. No black, No white etc.
It's a spiritual transformation, nothing about the physical.
And to answer the main question, YES, It works in any human culture!
It's all about the Kingdom mentality.