Ramdev said that the anti-national forces and terrorist elements do not want Modi to capture power.
"A fear psychosis is being created that if Modi will come, communal riots will break out in the country. They keep on raking the Gujarat riots issue, which were not engineered by Modi as is being told by some people," he said.
He said the Congress and some other parties were trying their level best to stop the Gujarat Chief Minister from becoming the next Prime Minister, "but the more they oppose him, the stronger he is emerging".
Making it clear that he had not joined the BJP and was only lending support to Modi and his party on certain issues, Ramdev said that people have lost faith in the Congress and were eager to give the BJP's Prime Ministerial candidate one chance.
"Among all the people, only Modi ji has shown us a ray of hope. I have offered everything, my organisation, my resources, everything at my disposal to see Modi becomes the next PM.
"The critical question at this juncture is to save the country from corruption, inflation, bad governance, poverty and unemployment, this is my rashtra-dharma as it should be for any patriotic person," he said.
Ramdev said despite being a non-political personality, he had received a number of threats from different people to stop his campaign against the Congress, "but I told them that for me country comes first and I don't care for my life".
Slamming the Congress candidate from Chandigarh and former Railway Minister Pawan Kumar Bansal, he said the "corruption taint" on him has not been washed no matter what he says in his defence.
"He remains a blot on Chandigarh's face, as far as the politics is concerned," he said.
Ramdev, who was here to support BJP candidate Kirron Kher, claimed that a "Modi wave" was blowing across the country and Congress would barely be able to get just 50 seats in the country in the lok Sabha polls while the "NDA would touch 300 mark".
"Today, the country under the Congress rule is passing through a phase of crises. The situation is worse than what was prevailing even at the time of the British rule," he said.
Kirron Kher, who was also present in the press conference along with Chandigarh BJP President Sanjay Tandon and former BJP MP from here Satya Pal Jain, alleged that Congress has always pursued the "divide and rule policy" for petty political gains.
"The country needs a strong and decisive leadership, which Modi ji can provide," she said.