"Detention without charges is the worst abomination in a democracy. When unjust laws are passed or unjust laws are invoked, what option do the people have than to protest peacefully?" the former home minister tweeted.
Hitting out at Prime Minister Narendra Modi, Chidambaram said, "the PM says that protests will lead to anarchy and laws passed by Parliament and legislatures must be obeyed. He has forgotten history and the inspiring examples of Mahatma Gandhi, Martin Luther King and Nelson Mandela".
Unjust laws must be opposed through peaceful resistance and civil disobedience. That is satyagraha, he added.