Senior BJP leader and Union Minister Giriraj Singh today criticized Bihar Chief Minister Nitish Kumar for his drive to unite opposition parties against BJP.<br />''<br />''Talking to the media in Patna Mr. Singh said, the campaign to unite Opposition parties and convene their meeting on the 12th of June is a futile exercise. He said, people will not accept their move because they have found trust with the BJP.<br />''<br />''Mr. Singh said, the JD (U) leader is playing in the hands of Congress while he has grown in politics being a follower of JP.<br />''<br />''He said Nitish Kumar should observe atonement over the betrayal of his promises made during the JP Movement against Congress.<br />''<br />''<br />