Southern India has particularly low Muslim populations - and definitely doesn’t follow that guidance.

The vedas have many sections which get widely ignored.

Edit: HN throttling is terrible. Here is a link to a couple studies [https://pubmed.ncbi.nlm.nih.gov/32641190/], [https://www.researchgate.net/figure/Trends-in-consanguineous...]

AP has the highest rate, around 28%