I'm not sure I can use the word Christian in association with them, isn't that the whole conflict?
My understanding is that both Orthodox and Roman Catholic "groups" have thought it necessary to absorb Thomas' church, and this causes a lot of distress to the RC's in Goa which was formerly a Portuguese colony/trading port.
There are a lot of sites on the net that give you all sides of this "Shivaesque debate".
Still, in this particular event I fail to see the Hindu element. No one did burnt sacrifice, and there was no sharing and shaking of the wheat chaf screen for example.
No one rolled out a linga and poured milk on it either.
What we have is some small group of people who are of the impression that "dancing" in a Christian service is either hareem (forbidden), or so unusual as to quite possibly not be Christian at all!!
Oh, yeah, and the Indian ladies wore silk saris.
Oh, my Heavens~!!
Of course in numerous socities around the world it is common to wear your best clothes to church ~ that old "First Fruits" doctrine at work ~ kind of Jewish, but Christians can do that stuff too.