who ?? if you talking about indian, they still eat meat (around 6 - 12 pound every year)
“Indian” does not seem to be a sufficiently cohesive group to qualify referring to them as “they” (in this matter).
https://www.pewresearch.org/religion/2021/06/29/religion-and...
Mean != distribution.
The mean human has approximately one ovary, one testicle. A few hundred million Indians refusing all meat is compatible with the others not doing that.