You can disagree with what Krishna said in the Bhagvad Geeta & reinterpret them in your own light. Nobody is going to torch you.
What about Islam? The prophet by saying that his was the last word of God devilishly underlined the fact that the Quran is not amenable to change. With the result that today a Muslim is nothing but a follower of the Quran. Take away the Quran & Islam vanishes. Indeed it is this extreme insecurity & an inferiority complex generated from the teachings of a demented ideology which causes Muslims to behave the way they do.
