"But I am not able understand how bluntly CPM is able to support the govt on Tibet issue but when it comes to N-Deal, they are dead against this"
The CPM is pretty consistent in representing chinese interests. To them communism is beyond criticism and western powers are always out to harm the communist nations. Little do they realise that they are nothing more than cultists and are a bunch of fundamentalists and bigots tied to an idea that has caused lots of blood shed
