He also alleged that Modi was a "chowkidar" only for a handful of industrialists and not the common man.
"But now, if you observe him closely, there is fear in his voice. There is even more fear in Jay Shah's father (Amit Shah)... and that is why he is going here and there," he said in an apparent dig at the saffron party's 'contact for support' campaign.
"In the last four years, the Modi government has created hatred and division in the society. Farmers and youth have been betrayed," he said.
"But the youth will have to be given jobs and farmers' interests need to be protected. The prime minister asks what the Congress has done during it rule... Congress didn't threaten and crush anybody. The party did not divide people over caste, religion and colour.
"Congress just saw if the individual was an Indian and it stood by him. Congress united the country," he said.
"Now, the party will not be seen after the assembly elections in Chhattisgarh, Rajasthan and Madhya Pradesh. The opposition led by Congress will defeat the BJP in the 2019 Lok Sabha polls," he claimed.
"The senior leader told me that he had spent 50 years of his political life fighting against the Congress. But now he has realised that in the battle of ideologies, only the Congress could defeat the BJP and the RSS ideology," he said.
When the voices in the audience asked if the leader was L K Advani, Gandhi said, "No it's not Advani."
He said the country had suffered due to the policies of the BJP in the last four years.
Taking a swipe at Modi, Gandhi said the Congress had fought and defeated Advani in 2004 and 2009 elections and Atal Bihari Vajpayee earlier. "But the Congress party's culture is to respect others. PM talks about Hindu religion, but forgets that the important teaching of our religion about respecting the guru (teacher)," he said.
"The prime minister doesn't even respect his guru at official functions. It's me, the Congress party and its ideology which accord him the due respect.
"Even when Vajpayee is ill in hospital, I was the first one to visit him, since the Congress believes he has contributed to the country," he said.
Describing the booth workers as "senapatis" (generals) of the party, he said at the convention that he will ensure that their respect and interests are protected.
"Ask anybody if candidates for Gujarat polls were parachuted from elsewhere. Ask Karnataka Congressmen whether or not their views were considered during the selection of candidates. The party belongs to you and it is your responsibility to protect and propagate the party ideology." he said.
Gandhi also asked the workers to talk to people about promises of Rs 15 lakh in bank accounts, 2 crore jobs annually and good price for farm produce and how the Modi government's decisions like demonetisation, GST rollout had hurt them.
Taking a dig at the media, he said, "Write sometimes about Rafale deal, Doklam. I know you and your higherups are under pressure. When the UPA was in power, you wrote about us openly and criticised us fearlessly."
Gandhi said he plans to create a wall in the new party headquarters in Delhi with the names of matryrs, who laid down their lives for the country, written on it.
"When Savarkar was writing mercy petitions to the British, Congress men and women were serving jail terms," he said.
Gandhi began his 30-minutes long speech with a couple of sentences in Marathi: Majha sarvanna namaskar. Apan sagle kase aahat. (My greetings to you. How are you all?)
Earlier today, the Congress chief appeared before a court in Bhiwandi town in neighbouring Thane district in connection with a defamation case filed against him by an RSS worker.
Talking to reporters outside the court, he took a swipe at Modi's radio programme 'Mann ki Baat' and said the prime minister does not speak about 'kaam ki baat' like providing employment to youth or safeguarding farmers.
"Let them (the BJP and the RSS) slap as many cases as they want against me. Ours is a fight of ideology. We will fight them and win," Gandhi said.
Kunte had filed the case after watching Gandhi's speech at an election rally in which he had claimed that the RSS was behind the killing of Mahatma Gandhi.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)