I don’t know how much I agree with that. My experience has been the complete opposite. I lived in a very rural East Texas town for a decade...worst ten years of my life. Conformity and uniformity ruled the day in East Texas. Everyone dressed alike, thought alike, spoke alike, etc. Now in DFW, there is much more diversity of every kind.
I guess I had a different experience. After working in 19 states I picked east Texas to buy a place to settle into. I can find everyone from Boulder style liberals to Louie Gomert conservatives.
Thine opus revealeth what manner of “diversity” meeteth thy favour.