Veteran screenwriter Salim Khan, who has been criticised for supporting the appointment of his superstar son Salman Khan as the goodwill ambassador of the national contingent for the Rio Olympics, is unhappy at being called "unfair" and "arrogant".

The 80-year-old on Thursday took to Twitter, where he mentioned that the "Dabangg" actor has been embroiled in controversy for "25 years", yet he never supported him.

WINDING UP. Salman has been in controversy for the last 25 years regularly. Not a single time i supported him. I was known as a fair person.

— Salim Khan (@luvsalimkhan) April 28, 2016

"Winding up. Salman has been in controversy for the last 25 years regularly. Not a single time I supported him. I was known as a fair person," Salim wrote. Salim mentioned that he is lending his support to Salman for the first time because of his belief that "what he is doing is right".

Now first time i support him on my belief that what he is doing is right. Instead and alcohol or tobacco he is promoting sports.

— Salim Khan (@luvsalimkhan) April 28, 2016

"Now first time I support him on my belief that what he is doing is right. Instead of alcohol or tobacco he is promoting sports," he said.

and i am called unfair, arrogant and asked to apologise. "Oh lord forgive them for they know not what they do" - Jesus

— Salim Khan (@luvsalimkhan) April 28, 2016

"And I am called unfair, arrogant and asked to apologise. 'Oh lord forgive them for they know not what they do' - Jesus," Salim wrote in another tweet.

On April 23, the ":Kick": star was unveiled as the goodwill ambassador of the Indian contingent for the Rio Olympics to be held later this year.

The move was questioned by several members of the Indian sports fraternity with 2012 London Olympics wrestling bronze medallist Yogeshwar Dutt making his displeasure public with a series of tweets barely an hour after the decision was announced.