Sibal's remarks invited a sharp riposte from the BJP which said people know who is a "Ram bhakt" (devotee to Lord Ram) and who is a "Rome bhakt", a clear dig at Congress chief Sonia Gandhi's Italian origin.
The sharp exchange of words between the two parties came a day after they fought over the Congress vice president's faith following appearance of his name in a register, which was meant for non-Hindus, in Somnath temple where he had gone yesterday.
Hitting back, BJP spokesperson GVL Narasimha Rao said, "People know who's a 'Ram bhakt' and a "Rome bhakt". The Congress government told the Supreme Court in 2007 that Lord Ram didn't exist. 'Babar ki bhakti' was to deny Hindus temple in Ayodhya," he said.
Rao alleged that the Congress called Hindus terrorists.
"Like his famous zero loss theory in the 2G scam which was rejected by the Supreme Court when it cancelled the licences, Kapil Sibal has come up with another zero theory saying Narendra Modi is not a real Hindu," he said.