Well, the Indian CAD ranking is correlated to the introduction of vegetable cooking oils and the eradication of authentic dairy ghee - as explored by Nina Teicholz in The Big Fat Suprise.
Also, in the same time period (1990s on) the SAD fast food chains and snack food cooking in the veg oil (and worse, adulteration with motor oil is an issue) exploded in India. And this has tragically affected Indians of all religions and dietary practices. Previous to this, CAD/diabetes/cancer were much lower.
Whereas the traditional land-based Indian diets (pre-Monsanto and the soil destruction that has gone with it) - for the middle and upper castes especially - were quite healthy, with lots of ghee, yogurt, and fresh cheese - and for Muslims (around 15% of the population) and Christians (just 2%, lots in Goa) - plenty of lamb/chicken/seafood etc.
Interestingly, older Hindu culture was more ayurvedic - and the vedic view of constitutional health is that some people’s physiologies and situations definitely require animal flesh protein. Last but not least - indigenous gatherer-hunter “tribal” peoples have a long history on the continent and its islands, and have been marginalized and exploited by most all organized religions and political empires - a whole other subject.