"I still wonder as to why Nitish Kumar failed to fulfill minimum courtesy to congratulate Narendra Modi over his hat-trick win till date," said BJP leader and Bihar Animal Husbandry Minister Giriraj Singh.
Singh, who returned from Gujarat after attending Narendra Modi's swearing-in ceremony as chief minister, said that he can understand that Nitish Kumar could not attend the function, but could not understand why he didn't congratulate Modi.
"It is for people to judge and decide," Singh said.
Nitish Kumar and his party the Janata Dal-United had expressed strong reservation for Narendra Modi
as BJP's prime ministerial candidate.
Nitish Kumar has claimed earlier that it would not take a minute for his party to break ties with the BJP if the latter projected Modi as its prime ministerial candidate.
Nitish Kumar had earlier objected to his photographs with Narendra Modi in newspaper advertisements during the BJP national executive meeting in Patna in June 2010.
Earlier this year, Singh said that if he had done anything wrong by describing Modi as a secular leader, Nitish Kumar should sack him from his cabinet. He said he would continue to support Narendra Modi, who, according to him, 'is 200 per cent more secular than any other leader'.
Singh, a few months ago, had called slain Ranvir Sena chief Brahmeshwar Singh Mukhiya a Gandhian.