There is a a difference between someone operating as a news channel actively continuously repeatedly spreading misinformation with the intention to undermine a government and a documentation which seem to be mostly correct but unpleasant to hear information.

Also there is a difference between restricting availability in your jurisdiction (country, country union, i.e. case RT) and trying to restrict it beyond that.

While it is questionable banning BBC in India is well in the right of the Indian government, it banning BBC (content) outside of India is on the other hand not something which should be possible/allowed/tolerated.