Sinha, who along with some other BJP veterans has been marginalised in the party, was speaking at a panel discussion at the 'Difficult Dialogues' conference here, where CPI-M general secretary Sitaram Yechury also spoke.
"There is absolutely no scope of no dialogue... This is the great strength of Indian democracy. There will be aberrations here and there, there might be concerns about the present situation. But the great Indian society will take care of it and consign to dust those who do not believe in dialogue in India," Sinha said.
Alluding to the general elections in 1977 when Congress was ousted from power, he said such a neglect (of dialogue) will make the government last "19 months", the same duration as the Emergency.
We all know how the people of India reacted to the Emergency which was the "most concerted democratic effort in our country to still the voice of dissent", he said.
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Replying to intervention from Yechury on need to ensure that dialogue in the society doesn't get stifled, he said, "I would only say that the stifler is in for serious trouble."
Without naming, he took a potshot at a Congress leader, who he said never raised concerns on the GST Bill in the standing committee meetings but later raised objections.
Under Vajpayee, the NDA government was able to pass several important legislations with the help of dialogue (with opposition), Sinha said.
His onslaught comes on the same day when another BJP leader, actor-MP Shatrughan Sinha, said that veteran leaders Vajpayee, L K Advani and Murli Manohar Joshi "deserve much more than what they have been given".