He also supported the demand made by the party veterans, including L K Advani, for fixing accountability, saying the "camouflage" of collective responsibility is unacceptable and that the responsibility must be fixed on individuals for corrective actions.
The Lok Sabha MP ridiculed any move to take action against him over his criticism of the party, saying it was just bravado of the ill-advised to talk of action.
His DNA barb is an apparent reference to Modi's DNA dig at Bihar Chief Minister Nitish Kumar who had made it a major campaign issue in the Bihar assembly election.
"Those responsible for the debacle must answer what, why, where and how it all happened. They must satisfy the real stalwarts/veterans of BJP. It's just bravado of the ill-advised to talk of action. The time is for reaction, understanding, apology and satisfaction of party godfathers," he said.
The former Union minister has also been effusive in his praise of Kumar, who led the grand alliance of JD(U)-RJD- Congress to a massive victory.
R K Singh, the Ara MP who had accused the party of giving tickets to people with criminal background, was recently summoned by BJP general secretary Ramlal, triggering the speculation that the party may take some disciplinary action against some leaders.