Conversation so far:
What political issues did Rajinikanth get involved with?
In 2002, Rajinikanth undertook a day-long fast to protest the Government of Karnataka's decision to not release Kaveri River water into Tamil Nadu.
Did he do anything else in support of this issue?
contribute Rs10 million (US$150,000) toward a plan to interlink Indian rivers.
Did he protest or anything?
His hunger strike was independent of the Nadigar Sangam, who organised their own solidarity protest for the same cause.
Did it work?
CANNOTANSWER.
Did he get involved with other political issues?
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's position on the issue of the Hogenakkal Falls water dispute?