Last year, Kher had shown disapproval with stars like Shah Rukh Khan and Aamir, who had voiced their 'concern' over growing intolerance, and followed it by leading a 'tolerance' march in the national capital.
The actor, who regularly takes on trolls on Twitter and expresses his opinion about various social and political issues, feels it is important that he stays true to himself, without thinking what others will say.
"I've been through that phase. I've discovered it is important to be myself. I am sure I have upset people with my opinions and there are people who are not very happy. But that's alright," Kher told PTI.
The 61-year-old actor insists that "acting is a part of my life, not my life" and hence as a citizen of the country, he will have opinions and will never hesitate to voice them.
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"People like to be popular with everybody, but it's important to be popular with myself first. I don't like people getting upset, but the truth is more important than not upsetting people.
"That's the way I've been brought up. My grandfather, father told me that truth is much more important than being popular with certain people. Even if you're popular with certain people, what do you get out of it?"
Kher believes he cannot please the whole world and people who are close to him will remain so, irrespective of what he says.
film. I've been part of all four and all of them different are from each one, and in all of them, he has presented me differently".
In the biopic of Dhoni, Kher plays the father of the Indian cricketer, who is played by actor Sushant Singh Rajput.
When the actor met Pan Singh Dhoni, he realised he had to lose weight to fit the character and underwent a "personal journey", without trying to "observe" anything from him.
"I didn't do that because this is not a father I didn't know. My father was like that, friend's father was like that. I've seen so many middle class, lower middle class fathers who are very ordinary people.
The actor is all praise for Dhoni's family, who he met and interacted with during the course of the film.
"His referring to his son constantly as 'Mahiya' was very endearing. Dhoni hasn't changed at all. There may be a Hummer outside his house, but it doesn't matter even if there is an aircraft or a cycle outside. His mother and father are very sweet, simple and nice people."