Speaking to a news channel, Kulkarni said, "I had decided to quit several weeks back. Yes, there were some ideological differences with the party and I had a painful realisation that I would no longer be able to contribute meaningfully to my party in future."
"I don't want to elaborate with the differences I hold with the party today. The party is going through a drift and I can't find myself making a meaningful contribution," he said.
Responding to a question on the recent controversy stirred by BJP leader Jaswant Singh, Kulkarni said that he had nothing to do with him.
"He has not written anything which warrants such disciplinary action. One should not misread Jaswant's book," he added.
Kulkarni was a full time BJP activist for at least 13 years and played a significant role in the party's transformation as a national party.