Conversation so far:
What political issues did Rajinikanth get involved with?
In 2002, Rajinikanth protested the Government of Karnataka's decision to not release Kaveri River water into Tamil Nadu.
Did Rajinikanth do anything else in support of his protest towards the Government of Karnataka?
Rajinikanth announced that he would contribute ₹10 million toward a plan to interlink Indian rivers.
Did Rajinikanth protest or anything toward the Government of Karnataka's decision to not release Kaveri River water into Tamil Nadu?
Rajinikanth undertook a day-long fast to protest.
Did Rajinikanth's day-long fast protest work?
Did Rajinikanth get involved with other political issues besides the Government of Karnataka's decision to not release Kaveri River water into Tamil Nadu?
In 2008, Rajinikanth took part in a hunger strike organised by the Nadigar Sangam against Karnataka's stance on the Hogenakkal Falls water dispute.

Question: What was his position on the issue?
Self-contained rewrite: What was Rajinikanth position on the issue against Karnataka's stance on the Hogenakkal Falls water dispute?