Ved Pratap Vaidik told IANS that he was amazed at the kind of people denouncing the movie. He said Ramdev might revise his critical views if he sees the Bollywood hit.
"Whatever Ramdev was told by people, on that basis he issued a statement (critical of the movie). But now perhaps he will see the film and form his own opinion," Vaidik said.
"The film is against hypocrites, against fraudulent people, against those who in the name of god or in the name of religion are setting up their own 'dhanda' (business).
"I was amazed why people are protesting against this film.
"The film should be watched before opposing it. (Critics) will stop opposing it if they watch it. The people are opposing the film because of a misunderstanding, there is no other reason," Vaidik said.
"PK" portrays Aamir Khan as an alien who is fascinated by India. The film released Dec 19 and also stars Anushka Sharma, Sanjay Dutt, Boman Irani and Sushant Singh Rajput.
Vaidik said filmmakers should not fear such protests.