Why? The recent synod was very favorable toward inculturation, within certain limits.
Exactly - limits. Did the synod define inculturation to include worship practices of indigenous cultures or merely indigenous practices where they don't act in a manner diametrically opposed to Catholicism. How could performing HINDU WORSHIP RITUALS and studying the Sanskrit not be opposed to Catholic teaching? Adopting indigenous practices into the Mass, worship or prayer services of Indian Catholics is one thing, but where those indigenous practices are rituals used in Hindu worship, a worship very different from Catholicism, that is quite different and could be misleading or ambiguous to both Hindu and Catholic.
Inculturation - sure. Adoption of non-Catholic religious worship practices and attempting to integrate them into Catholic worship services - why? How could it be anything but ambiguous and confusing?