"The BJP is manifesto is nothing but its communal agenda wrapped in colourful paper. It is a threat to the unity and integrity of the country," he told reporters here before setting out for campaign.
He said the BJP's move to re-open debate on Article 370 was "fraught with dangerous consequences" which would only help extremists and divisive elements.
"It is particularly a cause for worry when India is keenly watching the outcome of elections in Afghanistan. If anti-India forces come to power there, it could create problems along the borders. At this juncture, triggering a debate on the special status to Jammu and Kashmir would only help extremists," the Congress leader said.
Abrogation of the special status to Kashmir would only encourage divisive tendencies when the need of the hour was to promote the emotional unity, he said.
Antony exuded confidence that the UPA would come to power for a third time with the support of secular forces that are keen to avoid the "danger" of BJP under Narendra Modi assuming power.
"I am quite confident that the UPA will again come to power. As had happened in 2004 and 2009, secular parties which are even fighting the Congress now will support the party to lead a government after the polls," he said.