"A lot of people from the film industry brought up the issues of intolerance in haste, and it is childish to do so. I don't stand by them in this regard," Sinha said during a session on the last day of the Jaipur Literature Festival.
Sinha said he agreed with fellow actor Kajol's remarks at the festival recently about there being "no barrier, no line, no caste or creed in Bollywood."
Filmmaker Karan Johar on the inaugural day of the JLF had said that he believed the "talk about freedom of expression is the biggest joke in the world and democracy is the second biggest joke."
Meanwhile, Sinha also asked his biographer Bharathi S Pradhan to read out a portion from "Anything But Khamosh: The Shatrughan Sinha Biography" at the festival.
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The portion from the book talked about how Sinha had during the 1992 Bombay riots helped the current Imam Bukhari's brother to escape to safety.
"I agree that such people shouldn't be brought to the Rajya Sabha for time pass. This low attendance has always been there with celebrities being inducted into the Rajya Sabha merely to increase the prestige of the House. I don't know how in today's time the Parliament's prestige is being increased. I would have given them something else but I wouldn't have included them in the Rajya Sabha," Sinha said.
The actor also spoke candidly about his extra-marital affair, which is included in his biography.
One of the chapters in his biography has 'Shotgun' talking about his off-screen intimacy with co-actor Reena Roy and how the relationship continued for sometime even after his marriage with Poonam.
"Before I got married, my problem was not whom to marry, but rather whom not to marry," Sinha said.
Calling his biography a work of labour written over 10 years, he said it should motivate people with no support in a new profession to be able to do well.
Sinha also recalled an embarrassing moment which had to be deleted from the biography.
Shatrughan Sinha, who is fond of eating green chillis with his meals, said he had once refused to board a flight because they were unable to arrange for green chillis.