Colonial Portugese Catholic missionaries attempted an inquisition on Kerala Christians via the Synod of Diamper in 1599 which failed, culminating in the Coonan (Crooked) Cross Oath in 1653, the peoples rejection of Western Catholic imposition upon their beliefs and traditions.

To their credit, Anglican (British) missionaries did not attempt to force conversion. In fact they were pivotal to translating the Bible into the local language (Malayalam).

Kerala Christians were largely converted by Syrian missionaries in the 4th century based on archeological records.

Its interesting because many in North India and other Hindus in India associated Indian Christianity with aquiescence to colonial tyranny but there is a rich history that predates that predates colonists.