Christianity is India's third-largest religion with about 26 million adherents, making up 2.3 percent of the population as of the 2011 census.[1] The written records of St Thomas Christians mention that Christianity was introduced to the Indian subcontinent by Thomas the Apostle, who sailed to the Malabar region (present-day Kerala) in 52 AD.
There was lots of trade in lots of places and traditionally religions spread more slowly, not just one dude going a long distance. Yes, religion spreads along trade, that's not supporting, but that is not evidence that a single dude was primarily responsible. And the evidence that is true is mostly just internal local myth making.
Any christian community needs to boost is credibility, and hype up their own history.
Christianity is India's third-largest religion with about 26 million adherents, making up 2.3 percent of the population as of the 2011 census.[1] The written records of St Thomas Christians mention that Christianity was introduced to the Indian subcontinent by Thomas the Apostle, who sailed to the Malabar region (present-day Kerala) in 52 AD.
https://en.wikipedia.org/wiki/Christianity_in_India