Goat meat is more commonly eaten in North Africa, East Africa, Middle East, India

Goat Meat is more commonly eaten compared to sheep (Source: From the comments section in Lonely Planet discussion)

Goats usually have less diseases compared to sheep

Goat grow in hot temperature typical to tropical climates (My note: Sheep must be more suitable for colder climates and thus Aryan race. Dravidian-race/South Indians may be more suited for Goat meat rather than sheep meat. Just like South Indians are more suited for buffalo milk than cow milk).

https://www.lonelyplanet.com/thorntree/forums/get-stuffed/topics/goat-world-s-most-popular-meat?page=1