Any time you start a sentence with "I'm sorry but", generally (a) you aren't sorry (b) the following statement is going to be wrong.

He doesn't want to see lots of Indian local politics/culture topics, because they don't interest him. This implies no dislike of or prejudice against India, merely disinterest.

He doesn't in any way shape or form say that the people posting about such topics shouldn't be on the site, and his proposed rememedy - being able to block such topics, is clearly intended to allow him to co-exist on a site containing many such people and to still interact with those people about topics that do interest him.

Not all discrimination is born of prejudice.