He alleged that he was punished for "precipitating" the situation by "aggressively" speaking against Modi, which made it "untenable" for Kumar to stay in the NDA. (Agencies)
He said the best time to walk out of the NDA was when Kumar had cancelled a dinner for Narendra Modi and other BJP leaders in Patna (in 2009).
"Why did he (Kumar) retrace his steps after going this far?" Tiwari said.
"He missed the best time to walk out of NDA," Tiwari said claiming he had advised Kumar for this.
Tiwari, who joined the JD (U) after quitting RJD in 2008 and was made a Rajya Sabha member then, said Kumar continued with his anti-Modi policy after the 2010 Assembly elections.
"I aggressively opposed Narendra Modi and RSS. I was removed from the post of party spokesman to weaken my anti-Modi voice," he said.
Tiwari said recently the Chief Minister held a core committee meeting of the party in which state JD (U) president Bashistha Narayan Singh and several ministers were present.
"At the end of the meeting, the CM accused me and Agriculture Minister Narendra Singh, of speaking against Modi at the party convention at Rajgir on October 28-29, which made it untenable for Kumar to stay in NDA," he said.
"As a result, in the new committee was constituted by the party President Sharad Yadav, I was neither re-appointed spokesman nor general secretary," he added.
After being denied re-nomination to Rajya Sabha, Tiwari has been firing salvos at Kumar regularly. Tiwari and two others NK Singh and Shabir Ali were told to contest Lok Sabha elections instead. While Ali agreed to do so, Tiwari and Singh have declined.
He alleged that he was punished for "precipitating" the situation by "aggressively" speaking against Modi, which made it "untenable" for Kumar to stay in the NDA.