This is the kind of pseudo secular politics that discredits genuine secularism. India is a free country with freedom of speech protected by the constitution. Groups are free to protest against authors or their books but the government has a constitutional duty to protect free speech. And it should do so consistently regardless of whether the offended group is Muslim or Hindu or Christian or whatever.
Congress is useless and as dangerous to secularism as the communists or the Hindutva brigade.